| 2023  | 2022  | |
| £m  | £m  | |
| Receivables, which are included in ‘Trade and other receivables’  | 356.9  | 380.8  | 
| Contract assets, which are included in ‘Trade and other receivables’  | 1.6  | 1.5  | 
| Contract liabilities, which are included in ‘Trade and other payables’  | 2.3  | 2.5  | 
| 2023  | |||||||
| Flow  | Advanced  | Sensors  | |||||
| Control  | Refractories  | & Probes  | Total Steel  | Foundry  | Total  | ||
| Note  | £m  | £m  | £m  | £m  | £m  | £m  | |
| Segment revenue  | 793.0  | 567.9  | 39.1  | 1,400.0  | 529.8  | 1,929.8  | |
| – at a point in time  | 1,396.6  | 529.8  | 1,926.4  | ||||
| – over time  | 3.4  | –  | 3.4  | ||||
| Segment adjusted EBITDA  | 187.9  | 70.3  | 258.2  | ||||
| Segment depreciation and amortisation  | (40.3)  | (17.5)  | (57.8)  | ||||
| Segment trading profit  | 147.6  | 52.8  | 200.4  | ||||
| Return on sales margin  | 10.5%  | 10.0%  | 10.4%  | ||||
| Amortisation of acquired  | |||||||
| intangible assets  | (10.3)  | ||||||
| Operating profit  | 190.1  | ||||||
| Net finance costs  | (11.6)  | ||||||
| Share of post-tax profit of joint ventures  | 0.9  | ||||||
| Profit before tax  | 179.4  | ||||||
| Capital expenditure additions  | 93.2  | 32.1  | 125.3  | ||||
| Inventory  | 18  | 239.5  | 51.5  | 291.0  | |||
| Trade debtors  | 17  | 267.6  | 89.3  | 356.9  | |||
| Trade payables  | 27  | (177.7)  | (58.7)  | (236.4)  | |||
| 2022  | |||||||
| Flow  | Advanced  | Sensors  | |||||
| Control  | Refractories  | & Probes  | Total Steel  | Foundry  | Total  | ||
| Note  | £m  | £m  | £m  | £m  | £m  | £m  | |
| Segment revenue  | 810.9  | 645.3  | 40.2  | 1,496.4  | 551.0  | 2,047.4  | |
| – at a point in time  | 1,493.7  | 551.0  | 2,044.7  | ||||
| – over time  | 2.7  | –  | 2.7  | ||||
| Segment adjusted EBITDA  | 210.6  | 72.1  | 282.7  | ||||
| Segment depreciation and amortisation  | (37.9)  | (17.6)  | (55.5)  | ||||
| Segment trading profit  | 172.7  | 54.5  | 227.2  | ||||
| Return on sales margin  | 11.5%  | 9.9%  | 11.1%  | ||||
| Amortisation of acquired  | |||||||
| intangible assets  | (10.4)  | ||||||
| Operating profit  | 216.8  | ||||||
| Net finance costs  | (11.4)  | ||||||
| Share of post-tax profit of joint ventures  | 1.2  | ||||||
| Profit before tax  | 206.6  | ||||||
| Capital expenditure additions  | 85.2  | 18.7  | 103.9  | ||||
| Inventory  | 18  | 259.6  | 56.4  | 316.0  | |||
| Trade debtors  | 17  | 288.0  | 92.8  | 380.8  | |||
| Trade payables  | 27  | (177.2)  | (62.3)  | (239.5)  | |||
| External revenue  | Non-current assets  | |||
| 2023  | 2022  | 2023  | 2022  | |
| £m  | £m  | £m  | £m  | |
| EMEA  | 669.6  | 741.6  | 515.8  | 500.0  | 
| Asia  | 565.6  | 565.2  | 233.0  | 237.2  | 
| North America  | 528.7  | 549.1  | 404.1  | 384.3  | 
| South America  | 165.9  | 191.5  | 52.1  | 44.3  | 
| Revenue  | 1,929.8  | 2,047.4  | 1,205.0  | 1,165.8  | 
| 2023  | 2022  | ||
| Notes(s)  | £m  | £m  | |
| Cost of materials recognised as an expense  | 18  | 853.5  | 923.1  *  | 
| Research and development  | 37.4  | 35.9  | |
| Employee expenses  | 7  | 475.1  | 441.3  | 
| Depreciation  | 14  | 57.4  | 55.2  | 
| Amortisation  | 15  | 10.7  | 10.7  | 
| Operating lease charges  | 28  | 3.0  | 2.3  | 
| Expected credit loss allowances (credit)/charge  | 17, 24.2  | (2.6)  | 9.9  | 
| Other expenses  | 305.1  | 352.2  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Fees payable to the Company’s auditors and their associates for the audit  | ||
| of the Parent Company and Consolidated Financial Statements  | 1.0  | 1.1  | 
| Fees payable to the Company’s auditors and their associates for other services:  | ||
| Audit of the Company’s subsidiaries  | 1.1  | 1.0  | 
| Audit-related assurance services  | 0.2  | 0.2  | 
| Total auditors’ remuneration  | 2.3  | 2.3  | 
| 2023  | 2022  | ||
| Note  | £m  | £m  | |
| Wages and salaries  | 392.2  | 365.8  | |
| Social security costs  | 58.3  | 54.0  | |
| Share-based payments  | 26  | 7.3  | 5.1  | 
| Pension costs – defined contribution pension plans  | 25  | 12.1  | 10.8  | 
| – defined benefit pension plans  | 25  | 4.7  | 5.2  | 
| Other post-retirement benefits  | 25  | 0.5  | 0.4  | 
| Total employee expenses  | 475.1  | 441.3  | 
| 2023  | 2022  | |
| no.  | no.  | |
| Steel  | 9,057  | 8,720  | 
| Foundry  | 2,455  | 2,470  | 
| Total monthly average number of employees  | 11,512  | 11,190  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Short-term employee benefits  | 2.5  | 1.9  | 
| Post-employment benefits  | 0.2  | 0.3  | 
| Share-based payments  | 1.5  | 0.6  | 
| Total remuneration of key management personnel  | 4.2  | 2.8  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Interest payable on borrowings  | ||
| Loans and overdrafts  | 20.1  | 15.4  | 
| Interest on lease liabilities  | 2.4  | 1.9  | 
| Amortisation of capitalised arrangement fees  | 1.0  | 1.0  | 
| Total interest payable on borrowings  | 23.5  | 18.3  | 
| Interest on net retirement benefit obligations  | 2.3  | 1.4  | 
| Adjustment to discounts on provisions and other liabilities  | 2.4  | 1.1  | 
| Adjustment to discounts on receivables  | (1.3)  | (0.6)  | 
| Finance income  | (15.3)  | (8.8)  | 
| Total net finance costs  | 11.6  | 11.4  | 
| 2023  | 2022  | ||
| £m  | £m  | ||
| Current tax  | |||
| Overseas taxation  | 38.9  | 43.6  | |
| Adjustments in respect of prior years  | 6.7  | (1.1)  | |
| Total current tax, continuing operations  | 45.6  | 42.5  | |
| Deferred tax  | |||
| Origination and reversal of temporary taxable differences  | 6.2  | (23.6)  | |
| Adjustments in respect of prior years  | (3.0)  | (0.8)  | |
| Total deferred tax, continuing operations  | 3.2  | (24.4)  | |
| Total income tax charge  | 48.8  | 18.1  | |
| Total income tax charge attributable to:  | |||
| Continuing operations  | – headline performance  | 51.9  | 57.2  | 
| – separately reported  | (3.1)  | (39.1)  | |
| Total income tax charge  | 48.8  | 18.1  | 
| 2023  | 2022  | |
| Separately reported items  | £m  | £m  | 
| Additional recognition of UK deferred tax asset  | –  | (37.8)  | 
| Amortisation and utilisation of acquired intangibles  | (2.7)  | (2.7)  | 
| Recognition of deferred tax asset on acquired intangibles  | (0.4)  | –  | 
| Additional derecognition/(recognition) of US deferred tax asset  | –  | 1.4  | 
| Total tax credit separately reported  | (3.1)  | (39.1)  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Profit before tax  | 179.4  | 206.6  | 
| Tax at the UK corporation tax rate of 23.5% (2022: 19.0%)  | 42.1  | 39.2  | 
| Overseas tax rate differences  | 0.6  | 16.5  | 
| Withholding taxes  | 6.4  | 2.8  | 
| (Income)/expenses not (taxable)/deductible for tax purposes  | (4.6)  | 0.8  | 
| Utilisation of previously unrecognised tax losses  | –  | (0.8)  | 
| US deferred tax asset not previously recognised  | –  | (5.7)  | 
| UK deferred tax asset not previously recognised  | –  | (37.8)  | 
| Deferred tax assets not recognised  | 0.6  | –  | 
| Deferred tax rate changes  | –  | 1.1  | 
| Adjustments in respect of prior years  | 3.7  | 2.0  | 
| Total income tax charge  | 48.8  | 18.1  | 
| Other  | Other  | |||||
| operating  | Pension  | Intangible  | temporary  | |||
| Interest  | losses  | costs  | assets  | differences  | Total  | |
| £m  | £m  | £m  | £m  | £m  | £m  | |
| As at 1 January 2022  | 34.4  | 15.5  | 13.4  | (23.8)  | 35.1  | 74.6  | 
| Exchange adjustments  | 4.1  | 1.3  | 1.2  | (0.9)  | 2.2  | 7.9  | 
| Other net charge to Group Statement of  | ||||||
| Comprehensive Income  | –  | –  | (6.7)  | –  | (1.5)  | (8.2)  | 
| Other net credit/(charge) to Group Income Statement  | 0.1  | 37.2  | 0.2  | 2.9  | (1.1)  | 39.3  | 
| Other net credit/(charge) to Group Income Statement US  | 2.7  | (7.6)  | (1.4)  | (0.8)  | (7.8)  | (14.9)  | 
| As at 31 December 2022  | 41.3  | 46.4  | 6.7  | (22.6)  | 26.9  | 98.7  | 
| Exchange adjustments  | (1.8)  | 0.6  | (0.2)  | 0.8  | (1.8)  | (2.4)  | 
| Other net charge to Group Statement of  | ||||||
| Comprehensive Income  | –  | –  | (2.0)  | –  | –  | (2.0)  | 
| Other net (charge)/credit to Group Income Statement  | (5.7)  | (4.3)  | (1.5)  | 3.7  | 4.6  | (3.2)  | 
| As at 31 December 2023  | 33.8  | 42.7  | 3.0  | (18.1)  | 29.7  | 91.1  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Recognised in the Group Balance Sheet as:  | ||
| Non-current deferred tax assets  | 114.6  | 110.6  | 
| Non-current deferred tax liabilities  | (23.5)  | (11.9)  | 
| Net total deferred tax assets  | 91.1  | 98.7  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Deferred tax assets  | 8.9  | 18.2  | 
| Deferred tax liabilities  | (2.7)  | (2.7)  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Operating losses (further described below)  | 91.6  | 100.6  | 
| Unrelieved US interest (may be carried forward indefinitely)  | 0.7  | –  | 
| Capital losses available to offset future UK capital gains (may be carried forward indefinitely)  | 45.5  | 46.2  | 
| UK ACT credits (may be carried forward indefinitely)  | 19.3  | 19.3  | 
| Other temporary differences  | 4.7  | 9.0  | 
| Total deferred tax assets not recognised  | 161.8  | 175.1  | 
| Operating  | Operating  | Operating  | Operating  | |||
| losses  | losses not  | losses  | losses not  | |||
| recognised  | recognised  | Total  | recognised  | recognised  | Total  | |
| 2023  | 2023  | 2023  | 2022  | 2022  | 2022  | |
| £m  | £m  | £m  | £m  | £m  | £m  | |
| UK (may be carried forward indefinitely)  | 34.4  | 72.1  | 106.5  | 37.8  | 79.1  | 116.9  | 
| US (due to expire 2024–2031)  | 1.4  | –  | 1.4  | 2.6  | –  | 2.6  | 
| ROW (may be carried forward indefinitely)  | 6.9  | 19.5  | 26.4  | 6.0  | 21.5  | 27.5  | 
| 42.7  | 91.6  | 134.3  | 46.4  | 100.6  | 147.0  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Liabilities for income tax payable  | 3.5  | 12.8  | 
| Provisions for uncertain tax positions  | 6.3  | 6.8  | 
| 9.8  | 19.6  | |
| Less: Income tax recoverable within one year  | 11.5  | 15.3  | 
| Net (asset)/liability  | (1.7)  | 4.3  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Profit attributable to owners of the Parent  | 118.5  | 181.1  | 
| Adjustments for separately reported items:  | ||
| Amortisation of acquired intangible assets  | 10.3  | 10.4  | 
| Restructuring charges  | –  | –  | 
| Vacant site remediation costs  | –  | –  | 
| Guaranteed minimum pensions (GMP) equalisation charge  | –  | –  | 
| Income tax credit  | (3.1)  | (39.1)  | 
| Headline profit attributable to owners of the Parent  | 125.7  | 152.4  | 
| 2023  | 2022  | |
| millions  | millions  | |
| For calculating basic and headline EPS  | 269.1  | 269.6  | 
| Adjustment for potentially dilutive ordinary shares  | 3.0  | 1.9  | 
| For calculating diluted and diluted headline EPS  | 272.1  | 271.5  | 
| 2023  | 2022  | |
| pence  | pence  | |
| Earnings per share  | ||
| – reported basic  | 44.0  | 67.2  | 
| – reported diluted  | 43.6  | 66.7  | 
| – headline basic  | 46.7  | 56.5  | 
| – headline diluted  | 46.2  | 56.1  | 
| 2023  | 2022  | ||
| Notes  | £m  | £m  | |
| Operating profit  | 190.1  | 216.8  | |
| Adjustments for:  | |||
| Amortisation of acquired intangible assets  | 15  | 10.3  | 10.4  | 
| Restructuring charges  | –  | –  | |
| Vacant site remediation costs  | –  | –  | |
| Trading profit  | 200.4  | 227.2  | |
| Gain on disposal of non-current assets  | (2.5)  | (0.1)  | |
| Depreciation and amortisation  | 14  | 57.8  | 55.5  | 
| Defined benefit retirement plans net charge  | 5.2  | 5.6  | |
| Net decrease in inventories  | 18  | 9.9  | 2.2  | 
| Net decrease/(increase) in trade receivables  | 17  | 2.6  | (9.2)  | 
| Net increase/(decrease) in trade payables  | 27  | 8.3  | (28.0)  | 
| Net (increase)/decrease in other working capital  | (0.5)  | 24.7  | |
| Outflow related to restructuring charges  | 6  | (0.8)  | (1.5)  | 
| Defined benefit retirement plans cash outflows  | 25  | (7.4)  | (6.3)  | 
| Vacant site remediation costs paid  | (1.0)  | (1.8)  | |
| Cash generated from operations  | 272.0  | 268.3  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Cash at bank and in hand  | 164.2  | 184.2  | 
| Bank overdrafts  | (3.4)  | (4.4)  | 
| Cash and cash equivalents in the Group Statement of Cash Flows  | 160.8  | 179.8  | 
| Balance  | Balance  | |||||
| as at  | Foreign  | as at  | ||||
| 1 January  | exchange  | Fair value  | Non-cash  | Cash  | 31 December  | |
| 2023  | adjustments  | losses  | movements  *  | flow  | 2023  | |
| £m  | £m  | £m  | £m  | £m  | £m  | |
| Cash and cash equivalents  | ||||||
| Cash at bank and in hand  | 184.2  | (21.1)  | –  | –  | 1.1  | 164.2  | 
| Bank overdrafts  | (4.4)  | 0.1  | –  | –  | 0.9  | (3.4)  | 
| 179.8  | (21.0)  | –  | –  | 2.0  | 160.8  | |
| Borrowings, excluding bank overdrafts  | (440.2)  | 11.9  | –  | (33.6)  | 61.3  | (400.6)  | 
| Capitalised arrangement fees  | 2.7  | –  | –  | (0.9)  | –  | 1.8  | 
| Derivative financial instruments  | 2.7  | –  | (2.2)  | –  | –  | 0.5  | 
| Net debt  | (255.0)  | (9.1)  | (2.2)  | (34.5)  | 63.3  | (237.5)  | 
| Balance  | Balance  | |||||
| as at  | Foreign  | as at  | ||||
| 1 January  | exchange  | Fair value  | Non-cash  | Cash  | 31 December  | |
| 2022  | adjustments  | gains  | movements  *  | flow  | 2022  | |
| £m  | £m  | £m  | £m  | £m  | £m  | |
| Cash and cash equivalents  | ||||||
| Cash at bank and in hand  | 169.1  | 0.1  | –  | –  | 15.0  | 184.2  | 
| Bank overdrafts  | (6.7)  | (0.3)  | –  | –  | 2.6  | (4.4)  | 
| 162.4  | (0.2)  | –  | –  | 17.6  | 179.8  | |
| Borrowings, excluding bank overdrafts  | (440.3)  | (25.4)  | –  | (11.5)  | 37.0  | (440.2)  | 
| Capitalised arrangement fees  | 3.3  | –  | –  | (0.6)  | –  | 2.7  | 
| Derivative financial instruments  | (2.5)  | –  | 5.2  | –  | –  | 2.7  | 
| Net debt  | (277.1)  | (25.6)  | 5.2  | (12.1)  | 54.6  | (255.0)  | 
| Asset category  | Estimated useful life  | |
| Freehold property  | between 10 and 50 years  | |
| Leasehold property  | the term of the lease  | |
| Right-of-use assets  | shorter of the asset’s useful life and lease term  | |
| Plant and equipment  | – motor vehicles and information technology equipment  | between 1 and 5 years  | 
| – other  | between 3 and 15 years  | 
| Right-of-use  | Right-of-use  | ||||||
| assets – land  | assets – plant  | ||||||
| Freehold  | Leasehold  | & buildings  | & equipment  | Plant and  | Construction  | ||
| property  | property  | (Note 28.2)  | (Note 28.2)  | equipment  | in progress  | Total  | |
| £m  | £m  | £m  | £m  | £m  | £m  | £m  | |
| Cost  | |||||||
| As at 31 December 2021 and 1 January 2022  | 245.0  | 0.7  | 39.1  | 29.0  | 572.7  | 41.2  | 927.7  | 
| Exchange adjustments  | 16.0  | –  | 1.7  | 1.9  | 37.1  | 3.8  | 60.5  | 
| Capital expenditure additions  | 7.3  | –  | 3.3  | 8.1  | 20.8  | 59.9  | 99.4  | 
| Acquisitions through business combinations  | 1.1  | –  | 2.2  | –  | 0.2  | –  | 3.5  | 
| Disposals  | (1.6)  | –  | (1.1)  | (3.4)  | (14.9)  | (0.5)  | (21.5)  | 
| Reclassifications  | 1.3  | –  | –  | (0.2)  | 27.4  | (28.6)  | (0.1)  | 
| As at 31 December 2022 and 1 January 2023  | 269.1  | 0.7  | 45.2  | 35.4  | 643.3  | 75.8  | 1,069.5  | 
| Exchange adjustments  | (8.3)  | –  | (3.3)  | (1.7)  | (22.6)  | (0.8)  | (36.7)  | 
| Capital expenditure additions  | 15.8  | –  | 15.3  | 16.0  | 45.6  | 24.6  | 117.3  | 
| Disposals  | (3.9)  | (0.6)  | (3.6)  | (6.2)  | (18.8)  | (0.2)  | (33.3)  | 
| Reclassifications  | 6.1  | –  | –  | –  | 10.1  | (16.2)  | –  | 
| As at 31 December 2023  | 278.8  | 0.1  | 53.6  | 43.5  | 657.6  | 83.2  | 1,116.8  | 
| Accumulated depreciation and impairment losses  | |||||||
| As at 31 December 2021 and 1 January 2022  | 117.8  | 0.7  | 10.1  | 16.1  | 430.5  | –  | 575.2  | 
| Exchange adjustments  | 8.0  | –  | 0.4  | 1.0  | 29.0  | –  | 38.4  | 
| Depreciation charge  | 7.3  | –  | 5.7  | 6.8  | 35.4  | –  | 55.2  | 
| Impairment  | 0.9  | –  | 0.5  | –  | 0.1  | –  | 1.5  | 
| Disposals  | (0.4)  | –  | (1.1)  | (2.9)  | (13.9)  | –  | (18.3)  | 
| Reclassifications  | 3.9  | –  | –  | (0.1)  | (3.9)  | –  | (0.1)  | 
| As at 31 December 2022 and 1 January 2023  | 137.5  | 0.7  | 15.6  | 20.9  | 477.2  | –  | 651.9  | 
| Exchange adjustments  | (3.3)  | –  | (1.5)  | (1.0)  | (17.1)  | –  | (22.9)  | 
| Depreciation charge  | 7.6  | –  | 5.8  | 8.4  | 35.6  | –  | 57.4  | 
| Impairment  | –  | –  | –  | –  | –  | –  | –  | 
| Disposals  | (2.9)  | (0.6)  | (3.4)  | (5.3)  | (18.2)  | –  | (30.4)  | 
| Reclassifications  | 1.7  | –  | –  | –  | (1.7)  | –  | –  | 
| As at 31 December 2023  | 140.6  | 0.1  | 16.5  | 23.0  | 475.8  | –  | 656.0  | 
| Net book value as at 31 December 2023  | 138.2  | –  | 37.1  | 20.5  | 181.8  | 83.2  | 460.8  | 
| Net book value as at 31 December 2022  | 131.6  | –  | 29.6  | 14.5  | 166.1  | 75.8  | 417.6  | 
| Net book value as at 31 December 2021  | 127.2  | –  | 29.0  | 12.9  | 142.2  | 41.2  | 352.5  | 
| Other  | Other  | ||||||||
| acquired  | acquired  | ||||||||
| intangible  | 2023  | intangible  | 2022  | ||||||
| Goodwill  | assets  | Software  | total  | Goodwill  | assets  | Software  | total  | ||
| Note  | £m  | £m  | £m  | £m  | £m  | £m  | £m  | £m  | |
| Cost  | |||||||||
| As at 1 January  | 657.9  | 292.9  | 10.8  | 961.6  | 614.2  | 285.7  | 6.7  | 906.6  | |
| Reclassification of  | |||||||||
| non-compete agreements  | |||||||||
| to goodwill  *  | –  | –  | –  | –  | 0.9  | (0.9)  | –  | –  | |
| Exchange adjustments  | (27.0)  | (5.6)  | 0.2  | (32.4)  | 42.4  | 8.1  | 0.5  | 51.0  | |
| Capital expenditure additions  | –  | –  | 8.0  | 8.0  | –  | –  | 4.5  | 4.5  | |
| Disposals  | –  | –  | (0.2)  | (0.2)  | –  | –  | (0.9)  | (0.9)  | |
| Business combinations  | 19  | –  | –  | –  | –  | 0.4  | –  | –  | 0.4  | 
| Reclassifications  | –  | –  | –  | –  | –  | –  | –  | –  | |
| As at 31 December  | 630.9  | 287.3  | 18.8  | 937.0  | 657.9  | 292.9  | 10.8  | 961.6  | |
| Accumulated amortisation  | |||||||||
| and impairment losses  | |||||||||
| As at 1 January  | –  | 221.1  | 3.0  | 224.1  | –  | 206.7  | 3.1  | 209.8  | |
| Exchange adjustments  | –  | (3.4)  | (0.2)  | (3.6)  | –  | 4.0  | 0.2  | 4.2  | |
| Amortisation charge  | |||||||||
| for the year  | –  | 10.3  | 0.4  | 10.7  | –  | 10.4  | 0.3  | 10.7  | |
| Impairment  | –  | –  | –  | –  | –  | –  | 0.3  | 0.3  | |
| Disposals  | –  | –  | (0.2)  | (0.2)  | –  | –  | (0.9)  | (0.9)  | |
| Reclassifications  | –  | –  | –  | –  | –  | –  | –  | –  | |
| As at 31 December  | –  | 228.0  | 3.0  | 231.0  | –  | 221.1  | 3.0  | 224.1  | |
| Net book value as at  | |||||||||
| 31 December  | 630.9  | 59.3  | 15.8  | 706.0  | 657.9  | 71.8  | 7.8  | 737.5  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Steel Flow Control  | 275.1  | 286.8  | 
| Steel Advanced Refractories  | 146.1  | 152.5  | 
| Foundry  | 209.7  | 218.6  | 
| Total goodwill  | 630.9  | 657.9  | 
| Net book  | Net book  | ||
| Remaining  | value as at  | value as at  | |
| useful life  | 31 Dec 2023  | 31 Dec 2022  | |
| years  | £m  | £m  | |
| Steel Flow Control, Steel Advanced Refractories & Foundry  | |||
| – Foseco customer relationships (useful life: 20 years)  | 4.3  | 22.5  | 28.9  | 
| – Foseco trade name (useful life: 20 years)  | 4.3  | 15.4  | 19.0  | 
| Steel Advanced Refractories  | |||
| – URI customer relationships (useful life: 20 years)  | 18.0  | 5.9  | 6.6  | 
| – URI know-how (useful life: 20 years)  | 18.0  | 4.7  | 5.2  | 
| – CCPI customer relationships (useful life: 20 years)  | 15.2  | 10.8  | 12.1  | 
| Total  | 59.3  | 71.8  | 
| Decrease in  | |||||
| recoverable  | Impairment  | ||||
| Key assumption  | Relevant CGU  | Assumption  | Sensitivity  | value, £m  | arising, £m  | 
| Free cash flow average annual  | AR  | 67.0%  | Decrease the free cash flows  | (113.6)  | None  | 
| growth rate (3 year)  | by 20%  | ||||
| Pre-tax discount rate  | AR  | 12.3%  | Increase by 3.4%  | (153.1)  | None  | 
| Combination of both key  | AR  | 67.0% and  | Combination of both  | (236.1)  | (62.7)  | 
| assumptions above  | 12.3%  | sensitivities above  | 
| 2023  | 2022  | |||||||
| ECL  | ECL  | ECL  | ECL  | |||||
| Gross  | provision  | Net  | provision  | Gross  | provision  | Net  | provision  | |
| £m  | £m  | £m  | coverage  1  | £m  | £m  | £m  | coverage  1  | |
| Trade receivables  | ||||||||
| – current  | 308.9  | (0.7)  | 308.2  | 0.2%  | 305.4  | (2.3)  | 303.1  | 0.8%  | 
| – 1 to 30 days past due  | 34.7  | (0.3)  | 34.4  | 0.9%  | 51.4  | (1.6)  | 49.8  | 3.1%  | 
| – 31 to 60 days past due  | 10.1  | (0.7)  | 9.4  | 6.9%  | 14.1  | (0.6)  | 13.5  | 4.3%  | 
| – 61 to 90 days past due  | 2.5  | (0.3)  | 2.2  | 12.0%  | 7.3  | (0.2)  | 7.1  | 2.7%  | 
| – over 90 days past due  | 27.3  | (24.6)  | 2.7  | 90.1%  | 35.4  | (28.1)  | 7.3  | 79.4%  | 
| Trade receivables  | 383.5  | (26.6)  | 356.9  | 413.6  | (32.8)  | 380.8  | ||
| Other receivables  | 78.4  | 65.3  | ||||||
| Prepayments  | 25.2  | 30.8  | ||||||
| Total trade and other receivables  | 460.5  | 476.9  | ||||||
| 2023  | 2022  | |
| £m  | £m  | |
| Raw materials  | 96.9  | 104.6  | 
| Work in progress  | 20.6  | 22.0  | 
| Semi-finished goods  | 24.4  | 21.4  | 
| Finished goods  | 149.1  | 168.0  | 
| Total inventories  | 291.0  | 316.0  | 
| 2023  | 2022  | |||
| Nominal  | Nominal  | |||
| Number  | value  | Number  | value  | |
| Allotted, issued and fully paid ordinary shares of 10p each  | m  | £m  | m  | £m  | 
| As at 1 January  | 278.5  | 27.8  | 278.5  | 27.8  | 
| Share buyback  | (0.6)  | (0.1)  | –  | –  | 
| As at 31 December  | 277.9  | 27.7  | 278.5  | 27.8  | 
| Reserve  | Share  | Capital  | Other  | Total  | ||
| for own  | option  | redemption  | retained  | retained  | ||
| shares  | reserve  | reserve  | earnings  | earnings  | ||
| Notes  | £m  | £m  | £m  | £m  | £m  | |
| As at 31 December 2021 and 1 January 2022  | (34.5)  | 4.1  | –  | 2,513.8  | 2,483.4  | |
| Profit for the year  | –  | –  | –  | 181.1  | 181.1  | |
| Remeasurement of defined benefit liabilities/assets  | –  | –  | –  | 27.4  | 27.4  | |
| Recognition of share-based payments  | –  | 5.1  | –  | –  | 5.1  | |
| Release of share option reserve on exercised  | ||||||
| and lapsed options  | 1.2  | (1.2)  | –  | –  | –  | |
| Income tax on items recognised in other  | ||||||
| comprehensive income  | –  | –  | –  | (8.2)  | (8.2)  | |
| Purchase of ESOP shares  | (6.9)  | –  | –  | –  | (6.9)  | |
| Dividends paid  | 23  | –  | –  | –  | (58.1)  | (58.1)  | 
| As at 31 December 2022 and 1 January 2023  | (40.2)  | 8.0  | –  | 2,656.0  | 2,623.8  | |
| Profit for the year  | –  | –  | –  | 118.5  | 118.5  | |
| Remeasurement of defined benefit liabilities/assets  | –  | –  | –  | 8.4  | 8.4  | |
| Recognition of share-based payments  | –  | 7.3  | –  | –  | 7.3  | |
| Release of share option reserve on exercised  | ||||||
| and lapsed options  | 3.2  | (3.2)  | –  | –  | –  | |
| Income tax on items recognised in other  | ||||||
| comprehensive income  | –  | –  | –  | (2.0)  | (2.0)  | |
| Purchase of ESOP shares  | (1.1)  | –  | –  | –  | (1.1)  | |
| Share buyback  | –  | –  | (3.0)  | –  | (3.0)  | |
| Dividends paid  | 23  | –  | –  | –  | (60.7)  | (60.7)  | 
| As at 31 December 2023  | (38.1)  | 12.1  | (3.0)  | 2,720.2  | 2,691.2  | 
| Cash flow  | ||||
| Other  | hedge  | Translation  | Total other  | |
| reserves  | reserve  | reserve  | reserves  | |
| £m  | £m  | £m  | £m  | |
| As at 31 December 2021 and 1 January 2022  | (1,499.3)  | (1.1)  | 32.8  | (1,467.6)  | 
| Exchange differences on translation of the net assets of foreign operations  | –  | –  | 96.1  | 96.1  | 
| Exchange differences on translation of net investment hedges  | –  | –  | (20.7)  | (20.7)  | 
| Net change in costs of hedging  | –  | –  | –  | –  | 
| Change in the fair value of the hedging instrument  | –  | 8.3  | –  | 8.3  | 
| Amounts reclassified from the Income Statement  | –  | (7.5)  | –  | (7.5)  | 
| As at 31 December 2022 and 1 January 2023  | (1,499.3)  | (0.3)  | 108.2  | (1,391.4)  | 
| Exchange differences on translation of the net assets of foreign operations  | –  | –  | (80.8)  | (80.8)  | 
| Exchange differences on translation of net investment hedges  | –  | –  | 7.9  | 7.9  | 
| Net change in costs of hedging  | –  | 0.4  | –  | 0.4  | 
| Change in the fair value of the hedging instrument  | –  | (4.2)  | –  | (4.2)  | 
| Amounts reclassified from Net finance costs  | –  | 3.5  | –  | 3.5  | 
| As at 31 December 2023  | (1,499.3)  | (0.6)  | 35.3  | (1,464.6)  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Amounts recognised as dividends and paid to equity shareholders during the year  | ||
| Final dividend for the year ended 31 December 2021 of 15.0p per ordinary share  | –  | 40.5  | 
| Interim dividend for the year ended 31 December 2022 of 6.5p per ordinary share  | –  | 17.6  | 
| Final dividend for the year ended 31 December 2022 of 15.75p per ordinary share  | 42.4  | –  | 
| Interim dividend for the year ended 31 December 2023 of 6.8p per ordinary share  | 18.3  | –  | 
| 60.7  | 58.1  | 
| 2023  | 2022  | |||
| Assets  | Liabilities  | Assets  | Liabilities  | |
| £m  | £m  | £m  | £m  | |
| Investments (Level 2)  | 0.3  | –  | 0.5  | –  | 
| Derivatives not designated for hedge accounting purposes (Level 2)  | –  | (0.1)  | 0.1  | (0.1)  | 
| Derivatives designated for hedge accounting purposes (Level 2)  | 0.6  | –  | 2.7  | –  | 
| 2023  | 2022  | |||||
| Euro  | US dollar  | Other  | Euro  | US dollar  | Other  | |
| £m  | £m  | £m  | £m  | £m  | £m  | |
| Trade receivables  | 70.3  | 56.9  | 11.6  | 82.0  | 58.7  | 9.3  | 
| Cash at bank  | 6.5  | 12.1  | 2.6  | 10.1  | 9.8  | 0.7  | 
| Trade payables  | (43.0)  | (38.6)  | (17.8)  | (52.6)  | (47.4)  | (16.2)  | 
| Private Placement Notes  | (171.7)  | (91.1)  | –  | (175.2)  | (120.7)  | –  | 
| Bank loans and overdrafts  | (42.7)  | –  | –  | (44.8)  | (0.1)  | (0.1)  | 
| Lease liabilities  | (1.3)  | –  | (1.8)  | (1.5)  | (0.3)  | (0.8)  | 
| Cross-currency interest rate swaps  | (66.4)  | 67.6  | –  | (67.8)  | 71.1  | –  | 
| Foreign currency forward contracts  | ||||||
| – Buy foreign currency  | 0.5  | 2.4  | 0.1  | 0.9  | 4.8  | –  | 
| – Sell foreign currency  | (26.5)  | (27.6)  | –  | (16.9)  | (22.3)  | –  | 
| (274.3)  | (18.3)  | (5.3)  | (265.8)  | (46.4)  | (7.1)  | |
| Net unhedged monetary (liabilities)/assets  | ||||
| Euro  | US dollar  | Other  | Total  | |
| £m  | £m  | £m  | £m  | |
| Functional currency  | ||||
| Sterling  | (281.7)  | (22.4)  | 1.5  | (302.6)  | 
| Other  | 7.4  | 4.1  | (6.8)  | 4.7  | 
| As at 31 December 2023  | (274.3)  | (18.3)  | (5.3)  | (297.9)  | 
| Net unhedged monetary (liabilities)/assets  | ||||
| Euro  | US dollar  | Other  | Total  | |
| £m  | £m  | £m  | £m  | |
| Functional currency  | ||||
| Sterling  | (286.9)  | (49.3)  | 1.1  | (335.1)  | 
| Other  | 21.0  | 2.9  | (8.0)  | 15.9  | 
| As at 31 December 2022  | (265.9)  | (46.4)  | (6.9)  | (319.2)  | 
| Financial liabilities (gross borrowings)  | |||
| Fixed  | Floating  | ||
| rate  | rate  | Total  | |
| £m  | £m  | £m  | |
| Sterling  | 28.0  | 21.5  | 49.5  | 
| US dollar  | 91.1  | 0.1  | 91.2  | 
| Euro  | 171.7  | 43.4  | 215.1  | 
| Capitalised arrangement fees  | (0.7)  | (1.1)  | (1.8)  | 
| As at 31 December 2023  | 290.1  | 63.9  | 354.0  | 
| Financial liabilities (gross borrowings)  | |||
| Fixed  | Floating  | ||
| rate  | rate  | Total  | |
| £m  | £m  | £m  | |
| Sterling  | 28.0  | 33.3  | 61.3  | 
| US dollar  | 120.7  | 1.9  | 122.6  | 
| Euro  | 175.2  | 44.8  | 220.0  | 
| Capitalised arrangement fees  | (0.9)  | (1.8)  | (2.7)  | 
| As at 31 December 2022  | 323.0  | 78.2  | 401.2  | 
| 2023  | 2022  | |
| £m  | £m  | |
| As at 1 January  | 32.8  | 22.7  | 
| (Decrease)/increase in expected credit loss allowance recognised in profit or loss during the year  | (2.6)  | 9.9  | 
| Receivables written off during the year as uncollectable  | (2.6)  | (0.7)  | 
| Exchange adjustments  | (1.0)  | 0.9  | 
| As at 31 December  | 26.6  | 32.8  | 
| Between  | Between  | Total  | ||||
| Within  | 1 and 2  | 2 and 5  | Over  | contractual  | Carrying  | |
| 1 year  | years  | years  | 5 years  | cash flows  | amount  | |
| As at 31 December 2023  | £m  | £m  | £m  | £m  | £m  | £m  | 
| Trade payables  | 236.4  | –  | –  | –  | 236.4  | 236.4  | 
| Loans and overdrafts  | 22.3  | 68.0  | 196.9  | 103.9  | 391.1  | 355.8  | 
| Lease liabilities  | 13.5  | 12.2  | 17.0  | 19.4  | 62.1  | 48.2  | 
| Capitalised arrangement fees  | –  | –  | –  | –  | –  | (1.8)  | 
| Derivative liability  | 0.1  | –  | –  | –  | 0.1  | 0.1  | 
| Total financial liabilities  | 272.3  | 80.2  | 213.9  | 123.3  | 689.7  | 638.7  | 
| Between  | Between  | Total  | ||||
| Within  | 1 and 2  | 2 and 5  | Over  | contractual  | Carrying  | |
| 1 year  | years  | years  | 5 years  | cash flows  | amount  | |
| As at 31 December 2022  | £m  | £m  | £m  | £m  | £m  | £m  | 
| Trade payables  | 239.5  | –  | –  | –  | 239.5  | 239.5  | 
| Loans and overdrafts  | 52.6  | 9.2  | 255.3  | 133.4  | 450.5  | 403.8  | 
| Lease liabilities  | 12.3  | 9.2  | 13.2  | 13.5  | 48.2  | 40.8  | 
| Capitalised arrangement fees  | –  | –  | –  | –  | –  | (2.7)  | 
| Derivative liability  | 0.1  | –  | –  | –  | 0.1  | 0.1  | 
| Total financial liabilities  | 304.5  | 18.4  | 268.5  | 146.9  | 738.3  | 681.5  | 
| 2023  | 2022  | |||||
| UK  | US  | Germany  | UK  | US  | Germany  | |
| Life expectancy of pension plan members  | years  | years  | years  | years  | years  | years  | 
| Age to which current pensioners are expected to live:  | ||||||
| – Men  | 86.8  | 85.6  | 85.8  | 87.2  | 85.0  | 85.6  | 
| – Women  | 88.6  | 87.6  | 89.2  | 89.0  | 87.0  | 89.0  | 
| Age to which future pensioners are expected to live:  | ||||||
| – Men  | 87.0  | 87.1  | 88.5  | 87.5  | 86.5  | 88.4  | 
| – Women  | 90.0  | 89.0  | 91.4  | 90.5  | 88.4  | 91.3  | 
| 2023  | 2022  | |||||
| UK  | US  | Germany  | UK  | US  | Germany  | |
| % p.a.  | % p.a.  | % p.a.  | % p.a.  | % p.a.  | % p.a.  | |
| Discount rate  | 4.55  | 4.70  | 3.30  | 4.80  | 4.90  | 3.70  | 
| Price inflation  – using RPI for UK  | 3.05  | 2.50  | 2.25  | 3.25  | 2.50  | 2.35  | 
| – using CPI for UK  | 2.45  | n/a  | n/a  | 2.35  | n/a  | n/a  | 
| Rate of increase in pensionable salaries  | n/a  | n/a  | 3.00  | n/a  | n/a  | 3.10  | 
| Rate of increase to pensions in payment  | 2.85  | n/a  | 2.25  | 3.00  | n/a  | 2.35  | 
| Assumption  | Change in assumption  | UK  1  | US  | Germany  | 
| Discount rate  | Increase/decrease by 0.1%  | |||
| – impact on plan liabilities  | Decrease/increase by £3.7m  | Decrease/increase  | Decrease/increase  | |
| by £0.5m  | by £0.6m  | |||
| – impact on plan assets  | Decrease/increase by £3.7m  | n/a  | n/a  | |
| Price inflation  | Increase/decrease by 0.1%  | |||
| – impact on plan liabilities  | Increase/decrease by £2.6m  | n/a  | Increase/decrease  | |
| by £0.2m  | ||||
| – impact on plan assets  | Increase/decrease by £2.6m  | n/a  | n/a  | |
| Mortality  | Increase by one year  | |||
| – impact on plan liabilities  | Increase by £15.1m  | Increase by £2.0m  | Increase by £1.3m  | |
| – impact on plan assets  | Increase by £15.1m  | n/a  | n/a  | 
| Other post-  | |||||||
| retirement &  | |||||||
| Defined benefit pension plans  | long-term  | ||||||
| benefit  | |||||||
| UK  | US  | Germany  | ROW  | Total  | plans  | Total  | |
| £m  | £m  | £m  | £m  | £m  | £m  | £m  | |
| Present value as at 1 January 2023  | 325.2  | 59.9  | 38.4  | 43.3  | 466.8  | 9.4  | 476.2  | 
| Exchange differences  | –  | (3.0)  | (0.8)  | (1.5)  | (5.3)  | 0.3  | (5.0)  | 
| Current service cost  | –  | –  | 0.6  | 3.0  | 3.6  | 0.5  | 4.1  | 
| Interest cost  | 15.1  | 2.7  | 1.2  | 1.7  | 20.7  | 0.6  | 21.3  | 
| Gains arising over the year that are  | |||||||
| recognised in P&L  | –  | –  | –  | –  | –  | –  | –  | 
| Remeasurement of liabilities:  | |||||||
| – demographic changes  | (5.5)  | –  | –  | 0.1  | (5.4)  | –  | (5.4)  | 
| – financial assumptions  | 5.9  | 0.9  | 3.0  | (0.4)  | 9.4  | (0.1)  | 9.3  | 
| – experience losses/(gains)  | 8.8  | 0.4  | 0.5  | 0.5  | 10.2  | (0.1)  | 10.1  | 
| Benefits paid  | (21.1)  | (4.5)  | (1.6)  | (3.6)  | (30.8)  | (0.7)  | (31.5)  | 
| Present value as at 31 December 2023  | 328.4  | 56.4  | 41.3  | 43.1  | 469.2  | 9.9  | 479.1  | 
| Other post-  | |||||||
| retirement &  | |||||||
| Defined benefit pension plans  | long-term  | ||||||
| benefit  | |||||||
| UK  | US  | Germany  | ROW  | Total  | plans  | Total  | |
| £m  | £m  | £m  | £m  | £m  | £m  | £m  | |
| Present value as at 1 January 2022  | 464.3  | 70.2  | 53.3  | 48.3  | 636.1  | 7.0  | 643.1  | 
| Reclassification to other post-retirement  | |||||||
| & long-term benefit plans  | –  | –  | –  | (2.0)  | (2.0)  | 2.0  | –  | 
| Exchange differences  | –  | 7.9  | 2.2  | 1.7  | 11.8  | 0.7  | 12.5  | 
| Current service cost  | –  | –  | 1.0  | 3.0  | 4.0  | 0.8  | 4.8  | 
| Interest cost  | 9.0  | 1.8  | 0.7  | 0.7  | 12.2  | 0.3  | 12.5  | 
| Gains arising over the year that are  | |||||||
| recognised in P&L  | –  | –  | –  | –  | –  | (0.4)  | (0.4)  | 
| Remeasurement of liabilities:  | |||||||
| – demographic changes  | (6.1)  | –  | –  | (0.1)  | (6.2)  | –  | (6.2)  | 
| – financial assumptions  | (148.5)  | (15.0)  | (18.3)  | (6.8)  | (188.6)  | (0.5)  | (189.1)  | 
| – experience losses/(gains)  | 28.9  | (0.5)  | 1.1  | 0.8  | 30.3  | 0.3  | 30.6  | 
| Benefits paid  | (22.4)  | (4.5)  | (1.6)  | (2.3)  | (30.8)  | (0.8)  | (31.6)  | 
| Present value as at 31 December 2022  | 325.2  | 59.9  | 38.4  | 43.3  | 466.8  | 9.4  | 476.2  | 
| 2023  | 2022  | |||||||
| UK  | US  | ROW  | Total  | UK  | US  | ROW  | Total  | |
| £m  | £m  | £m  | £m  | £m  | £m  | £m  | £m  | |
| As at 1 January  | 348.6  | 37.4  | 34.1  | 420.1  | 486.4  | 48.3  | 31.4  | 566.1  | 
| Exchange differences  | –  | (2.0)  | (1.5)  | (3.5)  | –  | 5.5  | 1.2  | 6.7  | 
| Interest income  | 16.1  | 1.7  | 1.2  | 19.0  | 9.5  | 1.2  | 0.4  | 11.1  | 
| Return on plan assets  | 16.6  | 5.2  | 0.6  | 22.4  | (124.4)  | (13.4)  | 0.5  | (137.3)  | 
| Contributions from employer  | –  | –  | 3.8  | 3.8  | –  | –  | 2.7  | 2.7  | 
| Administration expenses paid  | (0.6)  | (0.5)  | –  | (1.1)  | (0.6)  | (0.6)  | –  | (1.2)  | 
| Benefits paid  | (20.9)  | (3.6)  | (3.4)  | (27.9)  | (22.3)  | (3.6)  | (2.1)  | (28.0)  | 
| As at 31 December  | 359.8  | 38.2  | 34.8  | 432.8  | 348.6  | 37.4  | 34.1  | 420.1  | 
| 2023  | 2022  | |
| total  | total  | |
| £m  | £m  | |
| Remeasurement of liabilities/assets:  | ||
| – demographic changes  | 5.4  | 6.2  | 
| – financial assumptions  | (9.3)  | 189.1  | 
| – experience losses  | (10.1)  | (30.6)  | 
| Return on plan assets  | 22.4  | (137.3)  | 
| Total movement  | 8.4  | 27.4  | 
| Other post-  | |||||||
| retirement &  | |||||||
| Defined benefit pension plans  | long-term  | ||||||
| benefit  | 2023  | ||||||
| UK  | US  | Germany  | ROW  | Total  | plans  | total  | |
| £m  | £m  | £m  | £m  | £m  | £m  | £m  | |
| Equities  | 18.5  | 3.9  | –  | 2.8  | 25.2  | –  | 25.2  | 
| Bonds  | –  | 32.8  | –  | 2.2  | 35.0  | –  | 35.0  | 
| Annuity insurance contracts  | 321.3  | –  | –  | 27.8  | 349.1  | –  | 349.1  | 
| Other assets  | 20.0  | 1.5  | –  | 2.0  | 23.5  | –  | 23.5  | 
| Fair value of plan assets  | 359.8  | 38.2  | –  | 34.8  | 432.8  | –  | 432.8  | 
| Present value of funded obligations  | (327.3)  | (49.1)  | –  | (39.9)  | (416.3)  | –  | (416.3)  | 
| 32.5  | (10.9)  | –  | (5.1)  | 16.5  | –  | 16.5  | |
| Present value of unfunded obligations  | (1.1)  | (7.3)  | (41.3)  | (3.2)  | (52.9)  | (9.9)  | (62.8)  | 
| Total net surpluses/(liabilities)  | 31.4  | (18.2)  | (41.3)  | (8.3)  | (36.4)  | (9.9)  | (46.3)  | 
| Recognised in the Group Balance Sheet as:  | |||||||
| Net surpluses  | 32.5  | –  | –  | 2.1  | 34.6  | –  | 34.6  | 
| Net liabilities  | (1.1)  | (18.2)  | (41.3)  | (10.4)  | (71.0)  | (9.9)  | (80.9)  | 
| Total net surpluses/(liabilities)  | 31.4  | (18.2)  | (41.3)  | (8.3)  | (36.4)  | (9.9)  | (46.3)  | 
| Other post-  | |||||||
| retirement &  | |||||||
| Defined benefit pension plans  | long-term  | ||||||
| benefit  | 2022  | ||||||
| UK  | US  | Germany  | ROW  | Total  | plans  | total  | |
| £m  | £m  | £m  | £m  | £m  | £m  | £m  | |
| Equities  | 12.1  | 0.5  | –  | 2.3  | 14.9  | –  | 14.9  | 
| Bonds  | –  | 35.6  | –  | 3.0  | 38.6  | –  | 38.6  | 
| Annuity insurance contracts  | 318.1  | –  | –  | 24.7  | 342.8  | –  | 342.8  | 
| Other assets  | 18.4  | 1.3  | –  | 4.1  | 23.8  | –  | 23.8  | 
| Fair value of plan assets  | 348.6  | 37.4  | –  | 34.1  | 420.1  | –  | 420.1  | 
| Present value of funded obligations  | (324.1)  | (51.7)  | –  | (40.2)  | (416.0)  | –  | (416.0)  | 
| 24.5  | (14.3)  | –  | (6.1)  | 4.1  | –  | 4.1  | |
| Present value of unfunded obligations  | (1.1)  | (8.2)  | (38.4)  | (3.1)  | (50.8)  | (9.4)  | (60.2)  | 
| Total net surpluses/(liabilities)  | 23.4  | (22.5)  | (38.4)  | (9.2)  | (46.7)  | (9.4)  | (56.1)  | 
| Recognised in the Group Balance Sheet as:  | |||||||
| Net surpluses  | 24.5  | –  | –  | 1.7  | 26.2  | –  | 26.2  | 
| Net liabilities  | (1.1)  | (22.5)  | (38.4)  | (10.9)  | (72.9)  | (9.4)  | (82.3)  | 
| Total net surpluses/(liabilities)  | 23.4  | (22.5)  | (38.4)  | (9.2)  | (46.7)  | (9.4)  | (56.1)  | 
| 2023  | 2022  | |||||
| Other post-  | Other post-  | |||||
| Defined  | retirement &  | Defined  | retirement &  | |||
| benefit  | long-term  | benefit  | long-term  | |||
| pension  | benefit  | pension  | benefit  | |||
| plans  | plans  | Total  | plans  | plans  | Total  | |
| £m  | £m  | £m  | £m  | £m  | £m  | |
| Current service cost  | 3.6  | 0.5  | 4.1  | 4.0  | 0.8  | 4.8  | 
| Gains arising over the year that are recognised in P&L  | –  | –  | –  | –  | (0.4)  | (0.4)  | 
| Administration expenses  | 1.1  | –  | 1.1  | 1.2  | –  | 1.2  | 
| Net interest cost  | 1.7  | 0.6  | 2.3  | 1.1  | 0.3  | 1.4  | 
| Total net charge  | 6.4  | 1.1  | 7.5  | 6.3  | 0.7  | 7.0  | 
| 2023  | 2022  | ||
| £m  | £m  | ||
| In arriving at trading profit  | – within other manufacturing costs  | 1.3  | 1.7  | 
| – within administration, selling and distribution costs  | 3.9  | 3.9  | |
| In arriving at profit before tax  | – within net finance costs  | 2.3  | 1.4  | 
| Total net charge  | 7.5  | 7.0  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Long-Term Incentive Plan  | 2.2  | 0.9  | 
| Other plans  | 5.1  | 4.2  | 
| Total expense  | 7.3  | 5.1  | 
| Number of outstanding awards  | ||||||
| As at  | Forfeited/  | As at  | ||||
| 1 Jan 2023  | Granted  | Exercised  | lapsed  | Expired  | 31 Dec 2023  | |
| LTIP  | 2,145,335  | 1,097,274  | (283,402)  | (777,326)  | nil  | 2,181,881  | 
| Weighted average exercise price  | nil  | nil  | nil  | nil  | nil  | nil  | 
| Other plans  | 1,722,689  | 1,486,666  | (439,041)  | (203,365)  | nil  | 2,566,949  | 
| Weighted average exercise price  | nil  | nil  | nil  | nil  | nil  | nil  | 
| Number of outstanding awards  | ||||||
| As at  | Forfeited/  | As at  | ||||
| 1 Jan 2022  | Granted  | Exercised  | lapsed  | Expired  | 31 Dec 2022  | |
| LTIP  | 1,939,964  | 981,558  | nil  | (776,187)  | nil  | 2,145,335  | 
| Weighted average exercise price  | nil  | nil  | nil  | nil  | nil  | nil  | 
| Other plans  | 549,033  | 1,513,457  | (228,175)  | (111,626)  | nil  | 1,722,689  | 
| Weighted average exercise price  | nil  | nil  | nil  | nil  | nil  | nil  | 
| 2023  | 2022  | |||||
| Weighted  | Weighted  | |||||
| average  | average  | |||||
| Awards  | outstanding  | Awards  | outstanding  | |||
| exercisable  | contractual  | Range of  | exercisable  | contractual  | Range of  | |
| as at  | life of  | exercise  | as at  | life of  | exercise  | |
| 31 Dec 2023  | awards  | prices  | 31 Dec 2022  | awards  | prices  | |
| no.  | years  | pence  | no.  | years  | pence  | |
| LTIP  | –  | 8.4  | –  | 8.3  | ||
| Weighted average exercise price  | –  | n/a  | –  | n/a  | ||
| Other plans  | –  | 0.6  | –  | 0.9  | ||
| Weighted average exercise price  | –  | n/a  | –  | n/a  | ||
| 2023  | |||
| LTIP ROIC/  | LTIP TSR  | ||
| ESG element  | element  | Other plans  | |
| Fair value of options granted  | 386p  | 238p  | 386p  | 
| Share price on date of grant  | 386p  | 386p  | 386p  | 
| Expected volatility  | n/a  | 34.6%  | n/a  | 
| Risk-free interest rate  | n/a  | 3.3%  | n/a  | 
| Exercise price (per share)  | nil  | nil  | nil  | 
| Expected term (years)  | 3  | 3  | 2  | 
| Expected dividend yield  | nil  | nil  | nil  | 
| 2022  | |||
| LTIP ROIC/  | LTIP TSR  | ||
| ESG element  | element  | Other plans  | |
| Fair value of options granted  | 385p  | 217p  | 385p  | 
| Share price on date of grant  | 385p  | 385p  | 385p  | 
| Expected volatility  | n/a  | 39.3%  | n/a  | 
| Risk-free interest rate  | n/a  | 1.28%  | n/a  | 
| Exercise price (per share)  | nil  | nil  | nil  | 
| Expected term (years)  | 3  | 3  | 2  | 
| Expected dividend yield  | nil  | nil  | nil  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Non-current  | ||
| Accruals and other payables  | 9.1  | 13.8  | 
| Total non-current other payables  | 9.1  | 13.8  | 
| Current  | ||
| Trade payables  | 236.4  | 239.5  | 
| Other taxes and social security  | 36.5  | 38.1  | 
| Accruals and other payables  | 104.9  | 100.8  | 
| Total current trade and other payables  | 377.8  | 378.4  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Not later than one year  | 0.6  | 0.5  | 
| Later than one year and not later than five years  | –  | 0.2  | 
| Later than five years  | –  | –  | 
| Total operating lease commitments  | 0.6  | 0.7  | 
| Disposal,  | ||||
| closure and  | ||||
| environmental  | Restructuring  | |||
| costs  | charges  | Other  | Total  | |
| £m  | £m  | £m  | £m  | |
| As at 31 December 2021 and 1 January 2022  | 41.7  | 5.0  | 4.0  | 50.7  | 
| Exchange adjustments  | 5.0  | 0.6  | 0.3  | 5.9  | 
| Charge to Group Income Statement – trading profit  | 16.7  | –  | 11.4  | 28.1  | 
| Adjustment to discount  | 1.1  | –  | –  | 1.1  | 
| Cash spend  | (6.8)  | (1.5)  | (10.3)  | (18.6)  | 
| Transferred to other balance sheet accounts  | –  | (0.5)  | –  | (0.5)  | 
| As at 31 December 2022 and 1 January 2023  | 57.7  | 3.6  | 5.4  | 66.7  | 
| Exchange adjustments  | (2.6)  | (0.1)  | (0.1)  | (2.8)  | 
| Charge to Group Income Statement – trading profit  | 1.5  | (0.3)  | 7.3  | 8.5  | 
| Adjustment to discount  | 2.3  | –  | –  | 2.3  | 
| Cash spend  | (7.0)  | (0.8)  | (8.3)  | (16.1)  | 
| As at 31 December 2023  | 51.9  | 2.4  | 4.3  | 58.6  | 
| Company  | Company  | ||||
| legal name  | Registered office address  | Jurisdiction  | legal name  | Registered office address  | Jurisdiction  | 
| Advent Process  | 333 Prince Charles Drive,  | Canada  | Foseco Holding  | 165 Fleet Street, London,  | England  | 
| Engineering Inc.  | Welland, Ontario,  | (Ontario)  | Limited  | EC4A 2AE, England  | |
| L3B 5P4, Canada  | Foseco Industrial e  | Km 15, Rodovia Raposo  | Brazil  | ||
| BMI Refractory  | 600 N 2nd Street, Suite 401,  | US  | Comercial Ltda  | Tavares, Butanta Cep,  | |
| Services Inc.  | Harrisburg, PA 17101-1071,  | (Pennsylvania)  | São Paulo, 05577-100, Brazil  | ||
| United States  | Foseco  | 170/69, 22nd Floor Ocean  | Thailand  | ||
| Brazil 1 Limited  | 165 Fleet Street, London,  | England  | International  | Tower 1, Ratchadapisek Road,  | |
| EC4A 2AE, England  | Holding  | Klongtoey, Bangkok,  | |||
| CCPI Inc.  | Suite 201, 910 Foulk Road,  | US  | (Thailand) Limited  | 10110, Thailand  | |
| Wilmington, New Castle,  | (Delaware)  | Foseco  | 1 Midland Way, Central Park,  | England  | |
| DE 19803, United States  | International  | Barlborough Links, Derbyshire,  | |||
| Cookson  | Km 7 1/2, Autopista San Isidro,  | Dominican  | Limited  | S43 4XA, England  | |
| Dominicana,  | Edificio Modelo A, Zona Franca  | Republic  | Foseco Japan  | 9th Floor, Orix Kobe Sannomiya  | Japan  | 
| SRL  | San Isidro, Santo Domingo  | Limited  | Building, 6-1-10, Goko dori, Chuo-  | ||
| Oeste, Dominican Republic  | ku, Kobe Hyogo, 651-0087, Japan  | ||||
| East Moon  | Unit 01, 86/F International  | Hong Kong  | Foseco Korea  | 74 Jeongju-ro, Bucheon-si,  | South Korea  | 
| Investment  | Commerce Centre,  | Limited  | Gyeonggi-do, 14523, South Korea  | ||
| (HK Holding)  | 1 Austin Road West,  | Foseco  | 165 Fleet Street, London,  | England  | |
| Company Limited  | Kowloon, Hong Kong  | Limited  | EC4A 2AE, England  | ||
| Flo-Con  | CT Corporation, 1209 Orange  | US  | Foseco  | CT Corporation, 1209 Orange  | US  | 
| Holding, Inc.  | Street, The Corporation Trust  | (Delaware)  | Metallurgical Inc.  | Street, The Corporation Trust  | (Delaware)  | 
| Company, Wilmington,  | Company, Wilmington,  | ||||
| DE 19801, United States  | DE 19801, United States  | ||||
| Foseco (FS)  | 1 Midland Way, Central Park,  | England  | Foseco  | Binnenhavenstraat 20, 7553 GJ  | Netherlands  | 
| Limited  | Barlborough Links, Derbyshire,  | Nederland BV  | Hengelo (OV), Netherlands  | ||
| S43 4XA, England  | |||||
| Foseco Overseas  | 165 Fleet Street, London,  | England  | |||
| Foseco (Jersey)  | 44 Esplanade, St Helier,  | Jersey  | Limited  | EC4A 2AE, England  | |
| Limited  | JE4 9WG, Jersey  | ||||
| Foseco Portugal  | Rua Manuel Pinto de Azevedo,  | Portugal  | |||
| Foseco (UK)  | 165 Fleet Street, London,  | England  | Produtos Para  | No 626 4100-320 Porto,  | |
| Limited  | EC4A 2AE, England  | Fundiçâo Lda  | Portugal  | ||
| Foseco Canada  | 181 Bay Street, Suite 1800,  | Canada  | Foseco S.A.S.  | Le Newton C, 7 Mail Barthélémy  | France  | 
| Limited  | Toronto, Ontario, M5J 2T9, Canada  (Ontario)  | Thimonnier, 77185 Lognes, France  | |||
| Foseco Espanola  | 5, Barrio Elizalde, Izurza,  | Spain  | Foseco Steel  | 1 Midland Way, Central Park,  | England  | 
| S.A.  | Bizkaia, 48213, Spain  | (UK) Limited  | Barlborough Links, Derbyshire,  | ||
| Foseco Foundry  | Room 819, Shekou Zhaoshang  | China  | S43 4XA, England  | ||
| (China)  | Building, Nanshan District,  | Foseco  | 165 Fleet Street, London,  | England  | |
| Co. Limited  | Shenzhen, Guangdong,  | Technology  | EC4A 2AE, England  | ||
| 518067, China  | Limited  | ||||
| Foseco  | 5, Barrio Elizalde,  | Spain  | J.H. France  | CT Corporation, 1209 Orange  | US  | 
| Fundición Holding  | Izurza, Bizkaia,  | Refractories  | Street, The Corporation Trust  | (Delaware)  | |
| (Espanola), S.L.  | 48213, Spain  | Company  | Company, Wilmington,  | ||
| Foseco Holding  | 165 Fleet Street, London,  | England  | DE 19801, United States  | ||
| (Europe) Limited  | EC4A 2AE, England  | John G. Stein &  | 1 Midland Way, Central Park,  | England  | |
| Foseco Holding  | 12 Bosworth Street,  | South Africa  | Company Limited  | Barlborough Links, Derbyshire,  | |
| (South Africa)  | Alrode, Alberton, 1449,  | S43 4XA, England  | |||
| (Pty) Limited  | South Africa  | Mainsail  | Victoria Place, 5th Floor,  | Bermuda  | |
| Foseco  | Rivium Boulevard 301,  | Netherlands  | Insurance  | 31 Victoria Street, Pembroke,  | |
| Holding BV  | Capelle aan den Ijssel, Rotterdam  | Company Limited  | Hamilton, HM 10, Bermuda  | ||
| 2909LK, Netherlands  | Mascinco  | Avenida Brasil, 49550 – parte,  | Brazil  | ||
| Foseco Holding  | 165 Fleet Street, London,  | England  | Empreendimentos  | Distrito Industrial de Palmares –  | |
| International  | EC4A 2AE, England  | e Participações  | Campo, Grande – Cep: 23065-480,  | ||
| Limited  | Ltda  | Rio de Janeiro, RJ, Brazil  | 
| Company  | Company  | ||||
| legal name  | Registered office address  | Jurisdiction  | legal name  | Registered office address  | Jurisdiction  | 
| Mercajoya, S.A.  | Capitán Haya, 56 – 1ºH,  | Spain  | Vesuvius China  | 86/F International Commerce  | Hong Kong  | 
| 28020 Madrid, Spain  | Holdings  | Centre, 1 Austin Road West,  | |||
| Co. Limited  | Kowloon, Hong Kong  | ||||
| Metal Way  | Estrada Santa Isabel, 7655 KM37,  | Brazil  | |||
| Equipamentos  | Bairro Do Una, Itaquaquecetuba,  | Vesuvius  | 165 Fleet Street, London,  | England  | |
| Metalurgicos Ltda  | São Paulo – SP, CEP: 08580 000, Brazil  | China Limited  | EC4A 2AE, England  | ||
| New Foseco  | 1 Midland Way, Central Park,  | England  | Vesuvius Colombia  Calle 26 No. 102-20 Floor 3,  | Colombia  | |
| (UK) Limited  | Barlborough Links, Derbyshire,  | S.A.S.  | Bogota, Colombia  | ||
| S43 4XA, England  | Vesuvius  | Via Nassa 17, Lugano,  | Switzerland  | ||
| Process Metrix,  | 6622 Owens Drive, Pleasanton,  | US  | Corporation S.A.  | CH 6900, Switzerland  | |
| LLC  | CA 94588, United States  | (California)  | Vesuvius  | ul. Jasnogórska 11,  | Poland  | 
| PT Foseco  | Jl Rawa Gelam 2/5, Kawasan  | Indonesia  | CSD Sp z.o.o.  | Kraków, 31-358, Poland  | |
| Indonesia  | Industri, Pulogadung, Jakarta,  | Vesuvius  | Warehouse No: 1J-09/3,  | United Arab  | |
| 13930, Indonesia  | Emirates FZE  | P O Box 49261,  | Emirates  | ||
| PT Foseco  | Jl Rawa Gelam 2/5, Kawasan  | Indonesia  | Hamriyah Free Zone, Sharjah,  | ||
| Trading Indonesia  | Industri, Pulogadung, Jakarta,  | United Arab Emirates  | |||
| 13930, Indonesia  | Vesuvius  | Gelsenkirchener Strasse 10,  | Germany  | ||
| Realisations 789,  | CT Corporation,  | US  | Europe GmbH  | Borken, D-46325, Germany  | |
| LLC  | 1209 Orange Street,  | (Delaware)  | Vesuvius  | 17 Rue de Douvrain, Ghlin,  | Belgium  | 
| The Corporation Trust Company,  | Europe S.A.  | 7011, Belgium  | |||
| Wilmington, DE 19801, United States  | |||||
| Vesuvius  | 3, Avenue De L’europe,  | France  | |||
| S G Blair &  | 1 Midland Way, Central Park,  | England  | Europe S.A.S.  | Parc Les Pivolles,  | |
| Company Limited  | Barlborough Links, Derbyshire,  | 69150 Décines-Charpieu, France  | |||
| S43 4XA, England  | |||||
| Vesuvius Financial  | 165 Fleet Street, London,  | England  | |||
| SIDERMES Inc.  | 175 montée Calixa-Lavallée,  | Canada  | 1 Limited  | EC4A 2AE, England  | |
| Vesuvius Sensors  | Verchêres, Québec J0L2R0,  | ||||
| and Probes  | Canada  | Vesuvius  | Pajamäentie 8D7,  | Finland  | |
| Finland OY  | 00360 Helsinki, Finland  | ||||
| SIR  | Siegener Strasse 152,  | Germany  | |||
| Feuerfestprodukte  | Kreuztal, D-57223,  | Vesuvius Foundry  | 12 Wei Wen Road,  | China  | |
| GmbH  | Germany  | Products (Suzhou)  | China-Singapore Suzhou Ind Park,  | ||
| Co. Limited  | Suzhou, Jiangsu Province,  | ||||
| SOLED S.A.S.  | Centre d’Activités Economiques  | France  | 215122, China  | ||
| Vesuvius Sensors  | Zone Industrielle de Franchepré  | ||||
| and Probes France  | 54240 Joeuf, France  | Vesuvius Foundry  | 2 Changchun Road,  | China  | |
| Technologies  | Economic Development Area,  | ||||
| Veservice  | Av Brasil, 49550, Distrito Industrial  | Brazil  | (Jiangsu) Co.  | Changshu, Jiangsu,  | |
| Ltda  | de Palmares, Campo Grande,  | Limited  | 215537, China  | ||
| Rio de Janeiro, 23065-480, Brazil  | |||||
| Vesuvius  | Rue Paul Deudon 68, Boite Postale 19,  | France  | |||
| Vesuvius  | 170/69, 22nd Floor Ocean Tower 1,  | Thailand  | France S.A.  | Feignies 59750, France  | |
| (Thailand)  | Ratchadapisek Road, Klongtoey,  | ||||
| Co., Limited  | Bangkok, 10110, Thailand  | Vesuvius  | Gelsenkirchener Strasse 10,  | Germany  | |
| GmbH  | Borken, D-46325, Germany  | ||||
| Vesuvius  | Street Urquiza, 919, Floor 2, Rosario,  | Argentina  | |||
| (V.E.A.R.) S.A.  | Provincia de Santa Fé, Argentina  | Vesuvius  | 165 Fleet Street, London,  | England  | |
| Group Limited  | EC4A 2AE, England  | ||||
| Vesuvius Advanced  Xiaotaizi Village, Ningyuan  | China  | ||||
| Ceramics (Anshan)  Town, Qianshan District, Anshan,  | Vesuvius  | 17 Rue de Douvrain, Ghlin,  | Belgium  | ||
| Co., Limited  | Liaoning Province, 114011, China  | Group S.A.  | 7011, Belgium  | ||
| Vesuvius  | 221 Xing Ming Street,  | China  | Vesuvius Holding  | Gelsenkirchener Strasse 10,  | Germany  | 
| Advanced  | China-Singapore Suzhou Ind Park,  | Deutschland  | Borken, D-46325,  | ||
| Ceramics (China)  | Suzhou, Jiangsu Province,  | GmbH  | Germany  | ||
| Co., Limited  | 215021, China  | Vesuvius Holding  | 68 Rue Paul Deudon, Boite Postale 19,  | France  | |
| Vesuvius  | 1209 Orange Street, Wilmington,  | US  | France S.A.S.  | Feignies 59750, France  | |
| America, Inc.  | DE 19801, United States  | (Delaware)  | Vesuvius Holding  | Via Mantova 10,  | Italy  | 
| Vesuvius Australia  | 40-46 Gloucester Boulevarde,  | Australia  | Italia – Società a  | 20835 Muggio  | |
| (Holding) Pty  | Port Kembla, NSW, 2505,  | Responsabilità  | MB, Italy  | ||
| Limited  | Australia  | Limitata  | |||
| Vesuvius Australia  | 40-46 Gloucester Boulevarde,  | Australia  | Vesuvius  | 165 Fleet Street, London  | England  | 
| Pty Limited  | Port Kembla, NSW, 2505, Australia  | Holdings Limited  | EC4A 2AE, England  | ||
| Vesuvius  | Zandvoordestraat 366, Oostende,  | Belgium  | Vesuvius Ibérica  | Capitán Haya, 56 – 1ºH,  | Spain  | 
| Belgium N.V.  | B-8400, Belgium  | Refractarios S.A.  | 28020 Madrid, Spain  | ||
| Vesuvius  | 181 Bay Street, Suite 1800,  | Canada  | Vesuvius  | CT Corporation, 1209 Orange Street,  | US  | 
| Canada Inc  | Toronto, Ontario, M5J 2T9, Canada  | International  | The Corporation Trust Company,  | (Delaware)  | |
| Corporation  | Wilmington, DE 19801, United States  | ||||
| Vesuvius Ceramics  | 165 Fleet Street, London,  | England  | |||
| Limited  | EC4A 2AE, England  | Vesuvius  | 165 Fleet Street,  | England  | |
| Investments  | London, EC4A 2AE,  | ||||
| Limited  | England  | 
| Company  | Company  | ||||
| legal name  | Registered office address  | Jurisdiction  | legal name  | Registered office address  | Jurisdiction  | 
| Vesuvius Istanbul  | Gebze OSB2 Mh. 1700.,  | Turkey  | Vesuvius Poland  | Ul Tyniecka 12, Skawina,  | Poland  | 
| Refrakter Sanayi  | Sok No:1704/1, Cayirova,  | Sp z.o.o.  | 32-050, Poland  | ||
| ve Ticaret AS  | Kocaeli, 41420, Turkey  | Vesuvius Process  | 3, Avenue de l’Europe,  | France  | |
| Vesuvius IT and  | 10th Floor, Unit No. 2, Fountainhead-  | India  | Metrix S.A.S.  | Parc Les Pivolles,  | |
| Shared Services  | Tower 3, B Wing, Phoenix Market City,  | 69150 Décines-Charpieu, France  | |||
| Private Limited  | Viman nagar, Pune, Pune- 411014,  | Vesuvius Ras Al  | Street No. F14, RAK Investment  | United  | |
| Maharashtra, India  | Khaimah FZ-LLC  | Authority Free Zone, Al Hamra,  | Arab  | ||
| Vesuvius Italia  | Via Mantova 10,  | Italy  | Ras Al Khaimah, PO Box 86408,  | Emirates  | |
| S.p.A.  | 20835 Muggio MB, Italy  | United Arab Emirates  | |||
| Vesuvius  | 9th Floor, Orix Kobe Sannomiya  | Japan  | Vesuvius  | Street San Martin 870,  | Chile  | 
| Japan Inc.  | Building 6-1-10, Goko dori,  | Refractarios de  | Room 308, Tower B,  | ||
| Chou-ku,Kobe Hyogo, 651-0087, Japan  | Chile S.A.  | Concepcion, Chile  | |||
| Vesuvius K.S.R.  | 1 Midland Way, Central Park,  | England  | Vesuvius  | Galati, Marea Unire avenue 107,  | Romania  | 
| Limited  | Barlborough Links, Derbyshire  | Refractories S.r.l.  | Galati county, 800329, Romania  | ||
| S43 4XA, England  | Vesuvius  | Room No. 9, 3rd Floor, 7 Ganesh  | India  | ||
| Vesuvius Life Plan  | 165 Fleet Street, London,  | England  | Refractory India  | Chandra Avenue, Kolkata,  | |
| Trustee Limited  | EC4A 2AE, England  | Private Limited  | WB 700013, India  | ||
| Vesuvius LLC  | 502, 5th floor, 1 Myasicsheva str.,  | Russia  | Vesuvius  | Avenida Brasil 49550, Distrito Industrial  | Brazil  | 
| Zhukovsky, Moscow region,  | Refratários  | de Palmares, Campo Grande, Rio de  | |||
| 140180, Russian Federation  | Ltda  | Janeiro, 23065-480, Brazil  | |||
| Vesuvius  | Unit 30-01, Level 30 Tower A,  | Malaysia  | Vesuvius  | 4, Forradsgatan, Amal, S-662 34,  | Sweden  | 
| Malaysia  | Vertical Business Suite Avenue 3,  | Scandinavia AB  | Sweden  | ||
| Sdn Bhd  | Bangsar South, No 8 Jalan Kerinchi,  | Vesuvius Sensors  | 10 Via Mantova, Muggio,  | Italy  | |
| Kuala Lumpur Wilayah Persekutuan,  | & Probes Europe  | Monza e Brianza,  | |||
| 59200, Malaysia  | S.p.A.  | 20835, Italy  | |||
| Vesuvius  | 165 Fleet Street, London,  | England  | Vesuvius-SERT  | 3, Avenue de l’Europe,  | France  | 
| Management  | EC4A 2AE, England  | S.A.S.  | Parc Les Pivolles,  | ||
| Limited  | 69150 Décines-Charpieu, France  | ||||
| Vesuvius  | 165 Fleet Street, London,  | England  | Vesuvius Services  | Calle Dean Valdivia 148, piso 11 –  | Peru  | 
| Management  | EC4A 2AE, England  | Peru S.A.C.  | oficina 1134, Edificio Platinum Plaza –  | ||
| Services Limited  | San Isidro, Lima, Peru  | ||||
| Vesuvius Mexico  | Av. Ruiz Cortinez, Num. 140, Colonia  | Mexico  | Vesuvius Solar  | 1/F, building 3, No. 12, Weiwen  | China  | 
| S.A. de C.V.  | Jardines de San Rafael, Guadalupe,  | Crucible (Suzhou)  | Road China-Singapore Suzhou  | ||
| Nuevo León, CP 67119, Mexico  | Co., Ltd  | Ind Park, Suzhou, Jiangsu Province,  | |||
| Vesuvius  | 56, rd 15, Apt 103, Maadi,  | Egypt  | 215122, China  | ||
| Mid-East Limited  | Cairo, Egypt  | Vesuvius South  | Pebble Lane, Private Bag X2,  | South  | |
| Vesuvius Moravia,  | Konska c.p. 740, Trinec,  | Czech  | Africa (Pty) Limited  Olifantsfontein, Gauteng  | Africa  | |
| s.r.o.  | 739 61, Czech Republic  | Republic  | Province, 1665, South Africa  | ||
| Vesuvius Mulheim  | Gelsenkirchener Strasse 10,  | Germany  | Vesuvius  | ul. Jasnogórska 11, Kraków,  | Poland  | 
| GmbH  | Borken, D-46325, Germany  | Sp z.o.o.  | 31-358, Poland  | ||
| Vesuvius NC, LLC  | Corporation Trust Center,  | US  | Vesuvius SSC  | ul. Jasnogórska 11, Kraków,  | Poland  | 
| 1209 Orange Street, Wilmington,  | (Delaware)  | Sp z.o.o.  | 31-358, Poland  | ||
| New Castle County, DE 19801,  | Vesuvius UK  | 1 Midland Way, Central Park,  | England  | ||
| United States  | Limited  | Barlborough Links, Derbyshire,  | |||
| Vesuvius New  | Bell Gully, Level 22, Vero Centre,  | New  | S43 4XA, England  | ||
| Zealand Limited  | 48 Shortland Street, Auckland,  | Zealand  | Vesuvius Ukraine  | 27, Udarnykiv Street, City of  | Ukraine  | 
| 1010 New Zealand  | LLC  | Dnipropetrovsk, 49000, Ukraine  | |||
| Vesuvius Overseas  | 165 Fleet Street, London,  | England  | Vesuvius USA  | CT Corporation, 208 South LaSalle  | US (Illinois)  | 
| Investments  | EC4A 2AE, England  | Corporation  | Street, Chicago, Cook County,  | ||
| Limited  | IL 60604, United States  | ||||
| Vesuvius Overseas  | 165 Fleet Street, London,  | England  | Vesuvius VA  | 165 Fleet Street, London,  | England  | 
| Limited  | EC4A 2AE, England  | Limited  | EC4A 2AE, England  | ||
| Vesuvius Penn  | Corporation Trust Center,  | US  | Vesuvius Vietnam  | 7th Floor, Peakview Tower Building,  | Vietnam  | 
| Corporation  | 1209 Orange Street, Wilmington,  | (Delaware)  | Limited  | No.36 Hoang Cau Street, O Cho Dua  | |
| DE 19801, United States  | Ward, Don Da District, Hanoi City,  | ||||
| Vesuvius Pension  | 165 Fleet Street, London,  | England  | Vietnam  | ||
| Plans Trustees  | EC4A 2AE, England  | Vesuvius Zyarock  | 1/F, building 3, No. 12, Weiwen  | China  | |
| Limited  | Ceramics (Suzhou)  | Road China-Singapore Suzhou  | |||
| Vesuvius Peru  | Calle Dean Valdivia 148, piso 11 –  | Peru  | Co., Limited  | Ind Park, Suzhou, Jiangsu Province,  | |
| S.A.C.  | oficina 1134, Edificio Platinum Plaza –  | 215122, China  | |||
| San Isidro, Lima, Peru  | 
| Company  | Company  | ||||
| legal name  | Registered office address  | Jurisdiction  | legal name  | Registered office address  | Jurisdiction  | 
| Vesuvius-Premier  | 1 Midland Way, Central Park,  | England  | Yingkou Bayuquan  Cui Tun Village, Hai Dong Office,  | China  | |
| Refractories  | Barlborough Links,  | Refractories Co.,  | Bayuquan District, Liaoning Province,  | ||
| (Holdings)  | Derbyshire, S43 4XA,  | Limited  | YingKou, 115007, China  | ||
| Limited  | England  | Yingkou YingWei  | 50 Wanghai New District, Bayuquan  | China  | |
| Wilkes-Lucas  | 165 Fleet Street, London  | England  | Magnesium Co.,  | District, Yinkou City, Liaoning Province,  | |
| Limited  | EC4A 2AE, England  | Ltd  | 115007, China  | 
| 2023  | 2022  | |
| £m  | £m  | |
| As at 1 January  | 13.0  | 12.8  | 
| Share of post-tax profit of joint ventures and associates  | 0.9  | 1.2  | 
| Dividends received from joint ventures and associates  | (1.0)  | (1.3)  | 
| Foreign exchange  | (1.6)  | 0.3  | 
| As at 31 December  | 11.3  | 13.0  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Revenue  | 46.0  | 50.9  | 
| Trading profit  | 2.3  | 3.2  | 
| Net finance costs  | –  | –  | 
| Profit before tax  | 2.3  | 3.2  | 
| Income tax expense  | (0.6)  | (0.8)  | 
| Profit after tax  | 1.7  | 2.4  | 
| Non-current assets  | 6.8  | 7.3  | 
| Current assets  | 22.0  | 22.6  | 
| Non-current liabilities  | –  | –  | 
| Current liabilities  | (7.1)  | (6.1)  | 
| Net assets  | 21.7  | 23.8  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Revenue  | 40.6  | 44.5  | 
| Depreciation  | 0.7  | 1.0  | 
| Trading profit  | 2.0  | 2.8  | 
| Net finance costs  | –  | –  | 
| Profit before tax  | 2.0  | 2.8  | 
| Income tax expense  | (0.5)  | (0.7)  | 
| Profit after tax  | 1.5  | 2.1  | 
| Non-current assets  | 6.5  | 7.0  | 
| Current assets  1  | 14.3  | 14.5  | 
| Non-current liabilities  | –  | –  | 
| Current liabilities  | (5.9)  | (5.0)  | 
| Net assets  | 14.9  | 16.5  | 
| 2023  | 2022  | |||
| Name of entity  | Registered address  | Jurisdiction  | % ownership  | % ownership  | 
| Wuhan Wugang-Vesuvius  | Gongnong Village Qingshan District, Wuhan,  | China  | 50  | 50  | 
| Advanced CCR Co., Limited  | Hubei Province, 430082, China  | |||
| Wuhan Wugang-Vesuvius  | Gongnong Village Qingshan District, Wuhan,  | China  | 50  | 50  | 
| Advanced Ceramics Co.,  | Hubei Province, 430082, China  | |||
| Limited  | 
| 2023  | 2022  | |||
| Name of entity  | Registered address  | Jurisdiction  | % ownership  | % ownership  | 
| Sapotech Oy  | Paavo Havaksen tie 5 D, 90570 Oulu, Finland  | Finland  | 14.9  | 14.9  | 
| Newshelf 480  | 144 Oxford Road, Rosebank, Melrose,  | South Africa  | 45  | 45  | 
| Proprietary Limited  | Johannesburg, 2196, South Africa  | 
| 2023  | 2022  | |||
| Name of entity  | Registered address  | Jurisdiction  | % ownership  | % ownership  | 
| Vesuvius India Limited  | P-104 Taratala Road, Kolkata, 700 088, India  | India  | 55.57  | 55.57  | 
| Foseco India Limited  | 922/923, Gat, Sanaswadi, Taluka, Shirur,  | India  | 74.98  | 74.98  | 
| Pune, 412208, India  | ||||
| Foseco Golden Gate  | 6 Kung Yeh 2nd Road, Ping Tung Dist,  | Taiwan  | 51  | 51  | 
| Company Limited  | Ping Tung, 90049, Taiwan  | |||
| Foseco (Thailand) Limited  | 170/69, 22nd Floor Ocean Tower 1, Ratchadapisek  | Thailand  | 74  | 74  | 
| Road, Klongtoey, Bangkok, 10110, Thailand  | ||||
| Vesuvius Ceska  | Prumyslová 726, Konská, Trinec, 739 61,  | Czech  | 60  | 60  | 
| Republika, a.s.  | Czech Republic  | Republic  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Summarised balance sheet  | ||
| Current assets  | 106.6  | 105.2  | 
| Current liabilities  | (32.0)  | (28.8)  | 
| Current net assets  | 74.6  | 76.4  | 
| Non-current assets  | 42.3  | 26.1  | 
| Non-current liabilities  | (3.9)  | (2.6)  | 
| Non-current net assets  | 38.4  | 23.5  | 
| Net assets  | 113.0  | 99.9  | 
| Accumulated non-controlling interests  | (50.5)  | (44.7)  | 
| Summarised statement of comprehensive income  | ||
| Revenue  | 155.0  | 137.7  | 
| Profit after tax  | 21.0  | 12.1  | 
| Profit allocated to non-controlling interests  | 9.3  | 5.4  | 
| Dividends paid to non-controlling interests  | (0.7)  | (0.7)  | 
| Summarised cash flows  | ||
| Cash flows from operating activities  | 10.9  | 13.8  | 
| Cash flows from investing activities  | (20.8)  | (11.6)  | 
| Cash flows from financing activities  | (0.1)  | (0.7)  | 
| Net (decrease)/increase in cash and cash equivalents  | (10.0)  | 1.5  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Sales to joint ventures  | 4.3  | 5.3  | 
| Purchases from joint ventures  | 30.1  | 32.3  | 
| Purchases from associates  | –  | –  | 
| Dividends received  | 1.0  | 1.3  | 
| Trade payables owed to joint ventures  | 10.3  | 6.7  | 
| Trade receivables due from joint ventures  | 1.0  | 0.7  | 
| 2023  | 2022  | ||
| Note  | £m  | £m  | |
| Cash generated from operations  | 11  | 272.0  | 268.3  | 
| Add: Outflows relating to restructuring charges  | 0.8  | 1.5  | |
| Less: Capital expenditure  | (92.6)  | (89.2)  | |
| Add: Vacant site remediation costs  | 1.0  | 1.8  | |
| Add: Proceeds from the sale of property, plant and equipment  | 5.4  | 3.1  | |
| Adjusted operating cash flow  | 186.6  | 185.5  | |
| Trading profit  | 200.4  | 227.2  | |
| Cash conversion  | 93%  | 82%  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Average trade working capital  | 451.8  | 487.3  | 
| Total revenue  | 1,929.8  | 2,047.4  | 
| Average trade working capital to sales ratio  | 23.4%  | 23.8%  | 
| 2023  | 2022  | ||
| Note  | £m  | £m  | |
| Total interest payable on borrowings  | 8  | 23.5  | 18.3  | 
| Finance income  | 8  | (15.3)  | (8.8)  | 
| Net interest payable on borrowings  | 8.2  | 9.5  | 
| 2023  | 2022  | ||
| Note  | £m  | £m  | |
| Adjusted EBITDA  | 4  | 258.2  | 282.7  | 
| Net interest payable on borrowings  | 8.2  | 9.5  | |
| Interest cover  | 31.5x  | 29.8x  | 
| 2023  | 2022  | ||
| Note  | £m  | £m  | |
| Net debt  | 13  | 237.5  | 255.0  | 
| Adjusted EBITDA  | 4  | 258.2  | 282.7  | 
| Net debt to adjusted EBITDA  | 0.9x  | 0.9x  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Average invested capital  | 1,558.5  | 1,503.6  | 
| Trading profit (Note 35.4)  | 200.4  | 227.2  | 
| Amortisation of acquired intangible assets  | (10.3)  | (10.4)  | 
| Share of post-tax profit from joint ventures and associates  | 0.9  | 1.2  | 
| Tax on trading profit and amortisation of acquired intangible assets  | (52.3)  | (57.5)  | 
| 138.7  | 160.5  | |
| ROIC  | 8.9%  | 10.7%  | 
| 2023  | 2022  | |
| £m  | £m  | |
| Cash  | 164.2  | 184.2  | 
| Undrawn committed debt facilities  | 333.4  | 322.5  | 
| Cash used as collateral on loans  | (10.0)  | (13.0)  | 
| Gross up of cash in notional pools  | –  | (0.1)  | 
| Liquidity  | 487.6  | 493.6  |