Disclosure Of Income Tax [Text Block]
| Concept |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of income tax [text block] | — | — | — | — | — | — | — | — | — | — |
| Major components of tax expense (income) [abstract] | ||||||||||
| Tax expense (income) | — | — | — |
125,900,000
GBP
|
— | — | — |
125,700,000
GBP
|
— | — |
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||
| Income tax relating to components of other comprehensive income | — |
800,000
GBP
|
–
GBP
|
19,300,000
GBP
|
18,500,000
GBP
|
3,000,000
GBP
|
— |
4,900,000
GBP
|
300,000
GBP
|
1,600,000
GBP
|
| Disclosure of temporary difference, unused tax losses and unused tax credits [text block] | — | — | — | — | — | — | — | — | — | — |
| Disclosure of temporary difference, unused tax losses and unused tax credits [abstract] | ||||||||||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | ||||||||||
| Deferred tax assets and liabilities [abstract] | ||||||||||
| Deferred tax assets |
2,800,000
GBP
|
— | — | — | — | — |
2,500,000
GBP
|
— | — | — |
| Deferred tax liabilities |
151,000,000
GBP
|
— | — | — | — | — |
105,100,000
GBP
|
— | — | — |
| Reconciliation of changes in deferred tax liability (asset) [abstract] | ||||||||||
| Changes in deferred tax liability (asset) [abstract] | ||||||||||
| Reconciliation of accounting profit multiplied by applicable tax rates [abstract] |