Disclosure Of Income Tax [Text Block]
| Concept |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-01-01 |
|---|---|---|---|---|---|
| Disclosure of income tax [text block] | — | — | — | — | — |
| Major components of tax expense (income) [abstract] | |||||
| Tax expense (income) | — |
4,900,000
GBP
|
— |
2,600,000
GBP
|
— |
| Income tax relating to components of other comprehensive income [abstract] | |||||
| Income tax relating to remeasurements of defined benefit plans included in other comprehensive income | — |
7,900,000
GBP
|
— |
2,100,000
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 |
11,600,000
GBP
|
— |
20,600,000
GBP
|
— |
15,200,000
GBP
|
| Deferred tax liabilities |
45,300,000
GBP
|
— |
45,500,000
GBP
|
— |
45,300,000
GBP
|
| Reconciliation of accounting profit multiplied by applicable tax rates [abstract] |