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] | |||
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
734,000
GBP
|
1,368,000
GBP
|
— |
| Categories of non-current financial assets [abstract] | |||
| Non-current financial assets at fair value through profit or loss [abstract] | |||
| Non-current financial assets at fair value through profit or loss |
1,228,736,000
GBP
|
1,007,206,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
103,358,000
GBP
|
207,155,000
GBP
|
109,848,000
GBP
|
| Borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
105,638,000
GBP
|
–
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
1,234,000
GBP
|
8,690,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
1,764,000
GBP
|
1,764,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1,052,090,000
GBP
|
1,033,173,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
1,332,828,000
GBP
|
1,215,729,000
GBP
|
— |
| Liabilities |
106,872,000
GBP
|
8,690,000
GBP
|
— |
| Assets (liabilities) |
1,225,956,000
GBP
|
1,207,039,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
104,092,000
GBP
|
208,523,000
GBP
|
— |
| Assets less current liabilities [abstract] |