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 |
351,400,000
GBP
|
353,700,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
1,659,100,000
GBP
|
1,577,600,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
7,300,000
GBP
|
5,300,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
209,700,000
GBP
|
322,200,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
303,000,000
GBP
|
272,700,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
359,600,000
GBP
|
392,400,000
GBP
|
583,300,000
GBP
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
1,387,300,000
GBP
|
980,300,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
–
GBP
|
89,400,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Trade and other non-current payables |
151,500,000
GBP
|
122,300,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
658,200,000
GBP
|
840,400,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
28,700,000
GBP
|
49,000,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
93,600,000
GBP
|
82,400,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1,707,200,000
GBP
|
1,437,700,000
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
3,300,000
GBP
|
2,500,000
GBP
|
— |
| Reserve of cash flow hedges |
1,900,000
GBP
|
800,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
9,300,000
GBP
|
9,300,000
GBP
|
— |
| Merger reserve |
143,900,000
GBP
|
143,900,000
GBP
|
— |
| Capital reserve |
6,600,000
GBP
|
6,600,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
3,161,500,000
GBP
|
3,173,000,000
GBP
|
— |
| Liabilities |
2,408,600,000
GBP
|
2,249,900,000
GBP
|
— |
| Assets (liabilities) |
752,900,000
GBP
|
923,100,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
873,300,000
GBP
|
991,500,000
GBP
|
— |
| Current liabilities |
703,600,000
GBP
|
986,100,000
GBP
|
— |
| Assets less current liabilities [abstract] |