Analysis Of Income And Expense [Abstract]
| Concept |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||||||
| Revenue | — | — | — | — |
–
GBP
|
8,6 08 . 2
GBP
|
— | — | — | — | — |
8,608 . 2
GBP
|
— |
–
GBP
|
6,8 26 .4
GBP
|
— | — | — | — | — |
6 ,8 26. 4
GBP
|
— | — | — |
| Material income and expense [abstract] | ||||||||||||||||||||||||
| Operating expense | — | — | — | — |
2 97. 5
GBP
|
1,118,500,000
GBP
|
— | — | — | — | — |
821 .0
GBP
|
— |
1 2 7. 1
GBP
|
1,198,400,000
GBP
|
— | — | — | — | — |
1, 32 5. 5
GBP
|
— | — | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations | — | — | — | — | — | — | — | — | — | — | — |
3. 2
GBP
|
— | — | — | — | — | — | — | — |
43. 3
GBP
|
— | — | — |
| Other comprehensive income, net of tax, hedges of net investments in foreign operations | — | — | — | — | — | — | — | — | — | — | — |
9,400,000
GBP
|
— | — | — | — | — | — | — | — |
3 7. 3
GBP
|
— | — | — |
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||||||||||||||
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — | — | — | — |
33 . 2
GBP
|
143 .0
GBP
|
— | — | — | — | — |
10 9.8
GBP
|
— |
0. 8
GBP
|
4 4. 2
GBP
|
— | — | — | — | — |
43. 4
GBP
|
— | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income |
–
GBP
|
–
GBP
|
6,200,000
GBP
|
3,15 4.4
GBP
|
— | — |
3,422 .4
GBP
|
50,700,000
GBP
|
211 . 1
GBP
|
3, 371 .7
GBP
|
–
GBP
|
3,422 .4
GBP
|
–
GBP
|
— | — |
16 . 3
GBP
|
2 , 2 18 .9
GBP
|
46 .6
GBP
|
6 .0
GBP
|
–
GBP
|
2, 265 . 5
GBP
|
–
GBP
|
–
GBP
|
2,2 41.2
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — | — | — | — | — |
3, 371 .7
GBP
|
— | — | — | — | — | — | — | — |
2, 2 18 .9
GBP
|
— | — | — |