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 |
10. 0
GBP
|
14 .1
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
28,200,000
GBP
|
2 4 .9
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in associates reported in separate financial statements |
2 .7
GBP
|
7. 6
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
3,400,000
GBP
|
4 .1
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
16 .5
GBP
|
25 .0
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
17 7. 7
GBP
|
2 24 .0
GBP
|
10 3 . 3
GBP
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
2 2 .6
GBP
|
73,200,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Borrowings, by type [abstract] | |||
| Bonds issued |
23 .7
GBP
|
14 0 . 3
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
3 1. 8
GBP
|
36 .4
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
400,000
GBP
|
400,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
4 8 . 6
GBP
|
35 . 6
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
16 .9
GBP
|
11,100,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Reserve of share-based payments |
22,200,000
GBP
|
1 9 .1
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
3 84 .0
GBP
|
5 6 5 .9
GBP
|
— |
| Liabilities |
10 0 . 0
GBP
|
2 7 7. 9
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
2 79. 3
GBP
|
4 0 1. 9
GBP
|
— |
| Current liabilities |
63 .7
GBP
|
18 7. 0
GBP
|
— |
| Assets less current liabilities [abstract] |