Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | — | — | — | — |
472,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
467,400,000
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 | — | — | — | — |
240,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
247,400,000
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 |
4,900,000
GBP
|
175,900,000
GBP
|
100,000
GBP
|
1,500,000
GBP
|
232,100,000
GBP
|
53,500,000
GBP
|
1,700,000
GBP
|
4,300,000
GBP
|
158,800,000
GBP
|
1,500,000
GBP
|
4,300,000
GBP
|
5,900,000
GBP
|
7,700,000
GBP
|
53,500,000
GBP
|
220,000,000
GBP
|
100,000
GBP
|
6,800,000
GBP
|
53,500,000
GBP
|
245,100,000
GBP
|
500,000
GBP
|
186,000,000
GBP
|
6,100,000
GBP
|
100,000
GBP
|
4,300,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |