Disclosure Of Fair Value Measurement [Text Block]
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As at 2022-04-30 |
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| 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 | — | — | — | — | — |
6,996,300,000
GBP
|
— | — | — | — |
6, 8 59 .7
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 | — | — | — | — | — |
3, 435 . 8
GBP
|
— | — | — | — |
3 , 52 7. 4
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 |
96 1 . 3
GBP
|
25. 3
GBP
|
6,200,000
GBP
|
4 ,4 40. 5
GBP
|
49. 8
GBP
|
3, 560. 5
GBP
|
96 1 . 3
GBP
|
4, 212 . 3
GBP
|
49. 8
GBP
|
6,300,000
GBP
|
3,3 32 .3
GBP
|
25. 2
GBP
|
25,000,000
GBP
|
6,500,000
GBP
|
4 ,01 6 .1
GBP
|
3 ,1 36 .1
GBP
|
9 6 1 . 3
GBP
|
49. 8
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |