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 |
51 6. 3
GBP
|
4 8 9.3
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Other intangible assets |
11 6 . 9
GBP
|
10 8 .1
GBP
|
— |
| Goodwill |
2 2 7. 8
GBP
|
2 13. 9
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
1. 5
GBP
|
1. 6
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
154 .4
GBP
|
117. 0
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
2 7. 8
GBP
|
19 . 3
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash |
3 7. 2
GBP
|
3 9. 3
GBP
|
— |
| Cash and cash equivalents |
36. 2
GBP
|
3 7. 9
GBP
|
2 9. 2
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
–
GBP
|
0. 5
GBP
|
— |
| Borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
70,600,000
GBP
|
9 1.7
GBP
|
— |
| Trade and other non-current payables [abstract] | |||
| Other non-current payables |
1 .1
GBP
|
1. 5
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
124 . 9
GBP
|
11 0 . 0
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
10. 9
GBP
|
13 . 9
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
300,000
GBP
|
–
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
3 3 .1
GBP
|
3 3 .1
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
35 9.8
GBP
|
319 . 4
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
81. 2
GBP
|
23. 8
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
1 ,1 6 7. 7
GBP
|
1, 0 6 9 . 8
GBP
|
— |
| Liabilities |
3 8 5.7
GBP
|
38 4 .4
GBP
|
— |
| Assets (liabilities) |
78 2.0
GBP
|
685,400,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
2 4 4 .1
GBP
|
1 9 7.1
GBP
|
— |
| Current liabilities |
2 6 1 .1
GBP
|
26 3. 0
GBP
|
— |
| Current assets (liabilities) |
1 7. 0
GBP
|
6 5.9
GBP
|
— |
| Assets less current liabilities [abstract] |