Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
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| Disclosure of fair value measurement [text block] | — | — | — | — |
19. FAIR VALUE MEASUREMENT
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— | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | ||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | ||||||||||||||||
| Assets | — | — | — |
1,064,875,000
GBP
|
— | — | — | — | — |
1,251,097,000
GBP
|
— | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | ||||||||||||||||
| Disclosure of fair value measurement of liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of liabilities [abstract] | ||||||||||||||||
| Disclosure of fair value measurement of liabilities [line items] | ||||||||||||||||
| Liabilities | — | — | — |
11,795,000
GBP
|
— | — | — | — | — |
12,219,000
GBP
|
— | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, liabilities [abstract] | ||||||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of equity [abstract] | ||||||||||||||||
| Disclosure of fair value measurement of equity [line items] | ||||||||||||||||
| Equity |
91,572,000
GBP
|
767,999,000
GBP
|
256,795,000
GBP
|
1,053,080,000
GBP
|
— |
63,286,000
GBP
|
46,328,000
GBP
|
767,999,000
GBP
|
20,223,000
GBP
|
1,238,878,000
GBP
|
444,774,000
GBP
|
463,163,000
GBP
|
1,254,655,000
GBP
|
767,999,000
GBP
|
–
GBP
|
23,493,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |