Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
3 6 7, 2 6 6
GBP
|
354,402,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
13 8,9 01
GBP
|
1 53 ,7 12
GBP
|
— |
| Goodwill |
6 45 ,0 62
GBP
|
635,7 51
GBP
|
— |
| Investment property [abstract] | |||
| Investment property |
2 4,609
GBP
|
26,08 4
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
9,53 6
GBP
|
4,584,000
GBP
|
— |
| Non-current finance lease receivables |
264,000
GBP
|
453,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
26 2 ,763
GBP
|
2 6 7, 6 9 4
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
361,598,000
GBP
|
399, 56 5
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
383,9 39
GBP
|
7 11 ,72 1
GBP
|
844 ,66 3
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current finance lease receivables |
195,000
GBP
|
196,000
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
204,21 9
GBP
|
253,502,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
4 0 5 ,1 4 1
GBP
|
420 ,653
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
15,363,000
GBP
|
1 5,0 6 8
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
5,000
GBP
|
29,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
7, 0 9 4
GBP
|
7, 8 7 0
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1, 332 ,9 92
GBP
|
1,4 11,053
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Revaluation surplus |
1 2 ,1 8 6
GBP
|
12,3 75
GBP
|
— |
| Reserve of exchange differences on translation |
75,282,000
GBP
|
8 7, 4 9 2
GBP
|
— |
| Reserve of cash flow hedges |
6,000
GBP
|
37,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Reserve of share-based payments |
6,5 62
GBP
|
8, 6 47
GBP
|
— |
| Capital redemption reserve |
2 ,1 9 5
GBP
|
1,3 89
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
2,8 0 6,514
GBP
|
2,9 86,833
GBP
|
— |
| Liabilities |
1 ,15 0 ,7 13
GBP
|
1, 24 1,254
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
1,212,786,000
GBP
|
1 ,383,5 40
GBP
|
— |
| Current liabilities |
492 ,956
GBP
|
5 0 7, 2 8 6
GBP
|
— |
| Assets less current liabilities [abstract] |