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 |
1,082,900,000
GBP
|
1,044,000,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets and goodwill |
1,310,600,000
GBP
|
1,408,500,000
GBP
|
| Investments accounted for using equity method [abstract] | ||
| Investments accounted for using equity method |
1,900,000
GBP
|
1,900,000
GBP
|
| Miscellaneous non-current assets [abstract] | ||
| Non-current net defined benefit asset |
130,000,000
GBP
|
113,500,000
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
349,500,000
GBP
|
395,700,000
GBP
|
| Classes of current inventories [abstract] | ||
| Current inventories |
367,900,000
GBP
|
341,200,000
GBP
|
| Classes of current inventories, alternative [abstract] | ||
| Cash and cash equivalents [abstract] | ||
| Cash [abstract] | ||
| Cash |
166,800,000
GBP
|
172 .5
GBP
|
| Cash and cash equivalents |
166,800,000
GBP
|
172 .5
GBP
|
| Trade and other non-current payables [abstract] | ||
| Other non-current payables |
1,100,000
GBP
|
1,100,000
GBP
|
| Trade and other current payables [abstract] | ||
| Trade and other current payables |
274,000,000
GBP
|
252,000,000
GBP
|
| Miscellaneous non-current liabilities [abstract] | ||
| Non-current net defined benefit liability |
25,700,000
GBP
|
2 6. 8
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
15,100,000
GBP
|
15,100,000
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
3,509,300,000
GBP
|
3,579,200,000
GBP
|
| Assets (liabilities) |
2,296,900,000
GBP
|
2,36 8.1
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
884,200,000
GBP
|
909,400,000
GBP
|
| Current liabilities |
336,500,000
GBP
|
320. 2
GBP
|
| Current assets (liabilities) |
547,700,000
GBP
|
589,200,000
GBP
|
| Assets less current liabilities [abstract] |