Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-29 |
As at 2023-12-31 |
|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||
| Property, plant and equipment [abstract] | ||
| Property, plant and equipment |
329,700,000
GBP
|
324 . 1
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets and goodwill |
141,000,000
GBP
|
156,100,000
GBP
|
| Investments accounted for using equity method [abstract] | ||
| Investments accounted for using equity method |
12 .1
GBP
|
7. 9
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
253,700,000
GBP
|
2 7 7. 8
GBP
|
| Classes of current inventories [abstract] | ||
| Current inventories |
1 9 7. 7
GBP
|
179,800,000
GBP
|
| Classes of current inventories, alternative [abstract] | ||
| Cash and cash equivalents [abstract] | ||
| Cash and cash equivalents |
111,900,000
GBP
|
12 6.7
GBP
|
| Miscellaneous current assets [abstract] | ||
| Current derivative financial assets |
100,000
GBP
|
3,600,000
GBP
|
| Borrowings [abstract] | ||
| Non-current portion of non-current borrowings |
213,800,000
GBP
|
2 3 7. 8
GBP
|
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings |
29,500,000
GBP
|
2 8.6
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | ||
| Trade and other current payables [abstract] | ||
| Trade and other current payables |
451,800,000
GBP
|
458,800,000
GBP
|
| Miscellaneous current liabilities [abstract] | ||
| Current derivative financial liabilities |
3,100,000
GBP
|
200,000
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
9,000,000
GBP
|
9,000,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
184,000,000
GBP
|
176 .0
GBP
|
| Accumulated other comprehensive income [abstract] | ||
| Reserve of exchange differences on translation |
12,100,000
GBP
|
3,000,000
GBP
|
| Reserve of cash flow hedges |
2,600,000
GBP
|
7,400,000
GBP
|
| Miscellaneous equity [abstract] | ||
| Reserve of share-based payments |
9,000,000
GBP
|
6,800,000
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
1,236,400,000
GBP
|
1,289,200,000
GBP
|
| Liabilities |
9 19.6
GBP
|
9 67. 7
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
563,800,000
GBP
|
587 .9
GBP
|
| Current liabilities |
5 0 7. 1
GBP
|
503,600,000
GBP
|
| Assets less current liabilities [abstract] |