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] | |||
| Miscellaneous non-current assets [abstract] | |||
| Non-current investments other than investments accounted for using equity method |
1,752,509,000
GBP
|
1,678,008,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Current prepayments and current accrued income other than current contract assets [abstract] | |||
| Current prepayments [abstract] | |||
| Current prepayments |
22,628,000
GBP
|
8,090,000
GBP
|
— |
| Current accrued income other than current contract assets |
133,534,000
GBP
|
102,166,000
GBP
|
— |
| Current prepayments and current accrued income including current contract assets [abstract] | |||
| Current accrued income including current contract assets [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
52,315,000
GBP
|
94,280,000
GBP
|
21,648,000
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Non-current portion of non-current loans received |
137,439,000
GBP
|
151,142,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Current accruals and current deferred income including current contract liabilities [abstract] | |||
| Accruals classified as current |
4,345,000
GBP
|
2,887,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
11,443,000
GBP
|
11,382,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
1,258,000
GBP
|
1,248,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
479,240,000
GBP
|
481,745,000
GBP
|
— |
| Current assets (liabilities) |
474,895,000
GBP
|
478,858,000
GBP
|
— |
| Assets less current liabilities [abstract] | |||
| Assets less current liabilities |
2,089,965,000
GBP
|
2,005,724,000
GBP
|
— |