Disclosure Of Fair Value Measurement [Text Block]
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As at 2022-03-31 |
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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 | — | — | — | — | — |
500,200,000
GBP
|
— | — |
47 6. 4
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 2 4 . 5
GBP
|
— | — |
2 91 . 8
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 |
1,000,000
GBP
|
1 4 7. 6
GBP
|
1,900,000
GBP
|
25,800,000
GBP
|
0 .7
GBP
|
175 . 7
GBP
|
200,000
GBP
|
1 . 5
GBP
|
18 4 .6
GBP
|
1,900,000
GBP
|
25,800,000
GBP
|
0 .7
GBP
|
300,000
GBP
|
156 . 2
GBP
|
1,000,000
GBP
|
1 . 3
GBP
|
600,000
GBP
|
1 .0
GBP
|
25,900,000
GBP
|
1 . 8
GBP
|
188,800,000
GBP
|
216 . 4
GBP
|
1,800,000
GBP
|
100,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |