Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
11,500,000
GBP
|
15. 3
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
38,200,000
GBP
|
33,800,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current finance lease receivables |
3 .7
GBP
|
4 .0
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
157 .5
GBP
|
182,500,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
68. 1
GBP
|
9 5 .7
GBP
|
12 3.2
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current finance lease receivables |
0 .9
GBP
|
800,000
GBP
|
— |
| Borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings |
15 .6
GBP
|
1 5. 8
GBP
|
— |
| Current borrowings and current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
121,500,000
GBP
|
14 8 .0
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
15,300,000
GBP
|
15. 3
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
222,200,000
GBP
|
242. 3
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
4 .2
GBP
|
2,500,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
355,500,000
GBP
|
41 5 .7
GBP
|
— |
| Liabilities |
217 .0
GBP
|
2 5 0.8
GBP
|
— |
| Assets (liabilities) |
138,500,000
GBP
|
1 6 4 .9
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
23 0.0
GBP
|
283. 3
GBP
|
— |
| Current liabilities |
160,500,000
GBP
|
187 .3
GBP
|
— |
| Current assets (liabilities) |
6 9. 5
GBP
|
96 .0
GBP
|
— |
| Assets less current liabilities [abstract] |