Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
118 .6
GBP
|
99,000,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
17 3 .0
GBP
|
17 5.6
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in subsidiaries reported in separate financial statements |
–
GBP
|
–
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
300,000
GBP
|
300,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
0. 3
GBP
|
600,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
15 5.9
GBP
|
14 8.8
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
193,200,000
GBP
|
123,900,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
3,462,900,000
GBP
|
2, 920. 7
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
8 61 .6
GBP
|
1 , 24 6 . 6
GBP
|
1 , 2 3 4.1
GBP
|
| Trade and other non-current payables [abstract] | |||
| Trade and other non-current payables |
214,800,000
GBP
|
203 .4
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
949,400,000
GBP
|
8 07. 0
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
31,900,000
GBP
|
3 1.9
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
2,868,500,000
GBP
|
3 ,0 55 .1
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
236,500,000
GBP
|
236,500,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
5 , 0 3 4 .1
GBP
|
4,792. 2
GBP
|
— |
| Liabilities |
1,594,800,000
GBP
|
1 , 1 67. 0
GBP
|
— |
| Assets (liabilities) |
3,439,300,000
GBP
|
3, 625 . 2
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
4,546,400,000
GBP
|
4, 322.5
GBP
|
— |
| Current liabilities |
1, 091.5
GBP
|
8 85 . 2
GBP
|
— |
| Assets less current liabilities [abstract] |