Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
14,000,000
GBP
|
1 6.0
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
37 .1
GBP
|
3 2.3
GBP
|
— |
| Goodwill |
22,600,000
GBP
|
23. 6
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in subsidiaries reported in separate financial statements |
–
GBP
|
–
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
245,600,000
GBP
|
203,300,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
4,400,000
GBP
|
6,100,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Other current receivables |
22,900,000
GBP
|
1 6.0
GBP
|
— |
| Trade and other current receivables |
624,400,000
GBP
|
689,600,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash |
27,600,000
GBP
|
42. 5
GBP
|
— |
| Cash and cash equivalents |
27,600,000
GBP
|
4 2.5
GBP
|
50. 7
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
2,600,000
GBP
|
2,900,000
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
423,100,000
GBP
|
459 .6
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
92. 8
GBP
|
52. 2
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
125,100,000
GBP
|
132,900,000
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
1. 6
GBP
|
4. 4
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
22,500,000
GBP
|
23. 4
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
513,400,000
GBP
|
503,200,000
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
25,300,000
GBP
|
32. 0
GBP
|
— |
| Reserve of cash flow hedges |
100,000
GBP
|
200,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
3,200,000
GBP
|
2,300,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
1,141,700,000
GBP
|
1, 189. 0
GBP
|
— |
| Liabilities |
675,400,000
GBP
|
687 .1
GBP
|
— |
| Assets (liabilities) |
46 6.3
GBP
|
501,900,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
693,600,000
GBP
|
754 .3
GBP
|
— |
| Current liabilities |
236,400,000
GBP
|
205 .1
GBP
|
— |
| Assets less current liabilities [abstract] |