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] | |||
| Trade and other non-current receivables [abstract] | |||
| Non-current prepayments and non-current accrued income other than non-current contract assets [abstract] | |||
| Non-current prepayments |
43,955,000
GBP
|
—
GBP
|
— |
| Non-current accrued income other than non-current contract assets |
130,842,000
GBP
|
133,534,000
GBP
|
— |
| Non-current prepayments and non-current accrued income including non-current contract assets [abstract] | |||
| Non-current accrued income including non-current contract assets [abstract] | |||
| Miscellaneous non-current assets [abstract] | |||
| Non-current investments other than investments accounted for using equity method |
1,783,857,000
GBP
|
1,752,509,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Current prepayments and current accrued income other than current contract assets [abstract] | |||
| Current prepayments [abstract] | |||
| Current prepayments |
60,520,000
GBP
|
22,628,000
GBP
|
— |
| Current prepayments and current accrued income including current contract assets [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
51,603,000
GBP
|
52,315,000
GBP
|
94,280,000
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Non-current portion of non-current loans received |
—
GBP
|
137,439,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Current accruals and current deferred income including current contract liabilities [abstract] | |||
| Accruals classified as current |
3,884,000
GBP
|
4,345,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
11,443,000
GBP
|
11,443,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
1,258,000
GBP
|
1,258,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
510,756,000
GBP
|
479,240,000
GBP
|
— |
| Current assets (liabilities) |
506,872,000
GBP
|
474,895,000
GBP
|
— |
| Assets less current liabilities [abstract] | |||
| Assets less current liabilities |
2,290,729,000
GBP
|
2,089,965,000
GBP
|
— |