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 |
5,000,000
GBP
|
10,000,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
23 .0
GBP
|
28 .2
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in associates reported in separate financial statements |
1,500,000
GBP
|
2,700,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
1,400,000
GBP
|
3,400,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
20,400,000
GBP
|
16,500,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
2 21.4
GBP
|
1 7 7. 7
GBP
|
2 24. 0
GBP
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
2,200,000
GBP
|
22,600,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
54 .7
GBP
|
—
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Borrowings, by type [abstract] | |||
| Bonds issued |
—
GBP
|
23,700,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
5 4.3
GBP
|
31,800,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
400,000
GBP
|
400,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
8 4. 9
GBP
|
4 8 . 6
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
14 . 2
GBP
|
16,900,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Reserve of share-based payments |
24 .0
GBP
|
22,200,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
373 .2
GBP
|
3 84.0
GBP
|
— |
| Liabilities |
126. 4
GBP
|
100,000,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
310. 4
GBP
|
279,300,000
GBP
|
— |
| Current liabilities |
1 1 7. 7
GBP
|
63,700,000
GBP
|
— |
| Assets less current liabilities [abstract] |