Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||
| Property, plant and equipment [abstract] | ||
| Property, plant and equipment |
68 8.5
GBP
|
7 0 5 .7
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Goodwill |
4 5 5 .1
GBP
|
4 6 5 .7
GBP
|
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||
| Investments in joint ventures reported in separate financial statements |
8 .1
GBP
|
7. 5
GBP
|
| Miscellaneous non-current assets [abstract] | ||
| Non-current net defined benefit asset |
2 6.0
GBP
|
16 . 5
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
2 2 7. 2
GBP
|
2 13 . 0
GBP
|
| Classes of current inventories [abstract] | ||
| Current inventories |
348,200,000
GBP
|
3 4 4 .1
GBP
|
| Classes of current inventories, alternative [abstract] | ||
| Cash and cash equivalents [abstract] | ||
| Cash and cash equivalents |
225,800,000
GBP
|
3 7 1. 3
GBP
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | ||
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners |
6,500,000
GBP
|
1. 5
GBP
|
| Miscellaneous current assets [abstract] | ||
| Current derivative financial assets |
2 .8
GBP
|
12 . 2
GBP
|
| Borrowings [abstract] | ||
| Non-current portion of non-current borrowings |
6 9 8 .6
GBP
|
8 7 0 . 3
GBP
|
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings |
12 4 . 2
GBP
|
0 .7
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | ||
| Trade and other non-current payables [abstract] | ||
| Trade and other non-current payables |
0 .1
GBP
|
0. 2
GBP
|
| Trade and other current payables [abstract] | ||
| Trade and other current payables |
3 9 1.6
GBP
|
4 3 1. 3
GBP
|
| Miscellaneous non-current liabilities [abstract] | ||
| Non-current net defined benefit liability |
7 5.7
GBP
|
8 1. 2
GBP
|
| Miscellaneous current liabilities [abstract] | ||
| Current derivative financial liabilities |
1. 6
GBP
|
2 .4
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
1,600,000
GBP
|
1,600,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
13 6 .7
GBP
|
20 9. 8
GBP
|
| Miscellaneous equity [abstract] | ||
| Capital redemption reserve |
900,000
GBP
|
0 .9
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
2 , 5 3 7. 2
GBP
|
2 , 7 0 6 .7
GBP
|
| Liabilities |
1 ,429.5
GBP
|
1, 5 4 4 .7
GBP
|
| Assets (liabilities) |
1 , 1 0 7. 7
GBP
|
1,16 2 . 0
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
826. 1
GBP
|
95 0 .9
GBP
|
| Current liabilities |
555. 1
GBP
|
4 8 8 .1
GBP
|
| Assets less current liabilities [abstract] |