Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
4 89. 3
GBP
|
52 2.6
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Other intangible assets |
1 0 8 .1
GBP
|
10 8 . 0
GBP
|
— |
| Goodwill |
213 .9
GBP
|
215 . 5
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in associates reported in separate financial statements |
–
GBP
|
4 .1
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
1. 6
GBP
|
2 .1
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
11 7. 0
GBP
|
11 6 . 2
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
19,300,000
GBP
|
15 . 8
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash |
3 9.3
GBP
|
3 0.7
GBP
|
— |
| Cash and cash equivalents |
3 7. 9
GBP
|
29. 2
GBP
|
20 .9
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
0. 5
GBP
|
–
GBP
|
— |
| Borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
91,700,000
GBP
|
5 3. 2
GBP
|
— |
| Trade and other non-current payables [abstract] | |||
| Other non-current payables |
1. 5
GBP
|
2,300,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
110 . 0
GBP
|
17 0 . 9
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
13. 9
GBP
|
16 . 2
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
3 3 .1
GBP
|
3 3 .1
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
319. 4
GBP
|
3 0 6 .7
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
24 .8
GBP
|
3 7. 9
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
1, 0 69 . 8
GBP
|
1 ,11 0 . 0
GBP
|
— |
| Liabilities |
3 84 .4
GBP
|
42 8.6
GBP
|
— |
| Assets (liabilities) |
6 8 5.4
GBP
|
6 8 1. 4
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
1 9 7 .1
GBP
|
18 6 . 3
GBP
|
— |
| Current liabilities |
26 3.0
GBP
|
29 4 .4
GBP
|
— |
| Current assets (liabilities) |
6 5. 9
GBP
|
1 0 8 .1
GBP
|
— |
| Assets less current liabilities [abstract] |