Disclosure Of Analysis Of Other Comprehensive Income By Item [Text Block]
| Concept |
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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|
| Disclosure of analysis of other comprehensive income by item [text block] | — | — | — | — | — | — |
| Disclosure of analysis of other comprehensive income by item [abstract] | ||||||
| Disclosure of analysis of other comprehensive income by item [line items] | ||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations | — |
17 . 7
GBP
|
17 . 7
GBP
|
35,400,000
GBP
|
35,400,000
GBP
|
— |
| Other comprehensive income, net of tax, cash flow hedges | — | — | — | — | — | — |
| Gains (losses) on cash flow hedges, net of tax |
13,200,000
GBP
|
— |
13,200,000
GBP
|
4,900,000
GBP
|
— |
4,900,000
GBP
|
| Other comprehensive income, net of tax, hedges of net investments in foreign operations | — | — | — | — | — | — |
| Gains (losses) on hedges of net investments in foreign operations, net of tax | — |
15,000,000
GBP
|
15. 0
GBP
|
17 .2
GBP
|
17 .2
GBP
|
— |