Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 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 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 |
As at 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of fair value measurement [text block] | — | — |
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 | — |
695,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
668,700,000
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 | — |
387,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
367,100,000
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 |
2,900,000
GBP
|
308,000,000
GBP
|
— |
192,000,000
GBP
|
4,800,000
GBP
|
114,100,000
GBP
|
5,800,000
GBP
|
2,900,000
GBP
|
104,000,000
GBP
|
192,000,000
GBP
|
4,800,000
GBP
|
301,600,000
GBP
|
2,100,000
GBP
|
303,600,000
GBP
|
192,000,000
GBP
|
4,800,000
GBP
|
98,300,000
GBP
|
2,900,000
GBP
|
5,600,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |