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 |
367,354,000
GBP
|
367,266,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets other than goodwill [abstract] | ||
| Intangible assets other than goodwill |
134,911,000
GBP
|
138,901,000
GBP
|
| Goodwill |
634,301,000
GBP
|
645,062,000
GBP
|
| Investment property [abstract] | ||
| Investment property |
27,325,000
GBP
|
24,609,000
GBP
|
| Miscellaneous non-current assets [abstract] | ||
| Non-current net defined benefit asset |
10,932,000
GBP
|
9,536,000
GBP
|
| Non-current finance lease receivables |
–
GBP
|
264,000
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
300 ,020
GBP
|
262,763,000
GBP
|
| Classes of current inventories [abstract] | ||
| Current inventories |
381,803,000
GBP
|
361,598,000
GBP
|
| Classes of current inventories, alternative [abstract] | ||
| Cash and cash equivalents [abstract] | ||
| Cash and cash equivalents |
359,430,000
GBP
|
383,939,000
GBP
|
| Miscellaneous current assets [abstract] | ||
| Current finance lease receivables |
98,000
GBP
|
195,000
GBP
|
| Borrowings [abstract] | ||
| Non-current portion of non-current borrowings |
188,372,000
GBP
|
204,219,000
GBP
|
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings and current portion of non-current borrowings |
49,000,000
GBP
|
–
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | ||
| Current borrowings and current portion of non-current borrowings, by type [abstract] | ||
| Trade and other current payables [abstract] | ||
| Trade and other current payables |
401,142,000
GBP
|
400,251,000
GBP
|
| Miscellaneous non-current liabilities [abstract] | ||
| Non-current net defined benefit liability |
9,591,000
GBP
|
15,363,000
GBP
|
| Miscellaneous current liabilities [abstract] | ||
| Current derivative financial liabilities |
5,000
GBP
|
5,000
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
6,744,000
GBP
|
7,094,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
1,305,649,000
GBP
|
1,332,992,000
GBP
|
| Accumulated other comprehensive income [abstract] | ||
| Revaluation surplus |
12,037,000
GBP
|
12,186,000
GBP
|
| Reserve of exchange differences on translation |
42,183,000
GBP
|
75,282,000
GBP
|
| Reserve of cash flow hedges |
6,000
GBP
|
6,000
GBP
|
| Miscellaneous equity [abstract] | ||
| Reserve of share-based payments |
6,802,000
GBP
|
6,562,000
GBP
|
| Capital redemption reserve |
2,548,000
GBP
|
2,195,000
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
2,752,241,000
GBP
|
2,806,514,000
GBP
|
| Liabilities |
1,156,040,000
GBP
|
1,150,713,000
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
1,192,114,000
GBP
|
1,212,786,000
GBP
|
| Current liabilities |
550,824,000
GBP
|
489,667,000
GBP
|
| Assets less current liabilities [abstract] |