Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2025-03-31 |
As at 2024-03-31 |
As at 2023-03-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
8,809,000
GBP
|
9,138,000
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 |
1,054,953,000
GBP
|
1,241,698,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
1,113,000
GBP
|
261,000
GBP
|
11,000
GBP
|
| Miscellaneous current liabilities [abstract] | |||
| Current accrued expenses and other current liabilities |
6,263,000
GBP
|
7,598,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
767,999,000
GBP
|
767,999,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital reserve |
256,795,000
GBP
|
444,774,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
1,064,875,000
GBP
|
1,251,097,000
GBP
|
— |
| Liabilities |
11,795,000
GBP
|
12,219,000
GBP
|
— |
| Assets less current liabilities [abstract] |