Analysis Of Income And Expense [Abstract]
| Concept |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||
| Revenue [abstract] | ||||||||||||
| Revenue | — | — | — |
2,348,000,000
GBP
|
— | — | — |
2,202,200,000
GBP
|
— | — | — | — |
| Expenses by nature [abstract] | ||||||||||||
| Classes of employee benefits expense [abstract] | ||||||||||||
| Expense from share-based payment transactions with employees |
8,700,000
GBP
|
–
GBP
|
–
GBP
|
8,700,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
11,900,000
GBP
|
11,900,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||
| Share of profit (loss) of joint ventures accounted for using equity method | — | — | — |
56. 1
GBP
|
— | — | — |
22,400,000
GBP
|
— | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income | — | — | — |
480,800,000
GBP
|
— | — | — |
425,400,000
GBP
|
— | — | — | — |