Statement Of Changes In Equity [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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||
| Purchase of treasury shares |
—
GBP
|
4 5 4
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
45 4
GBP
|
— | — | — | — | — | — | — |
| Cancellation of treasury shares | — | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
1 0
GBP
|
—
GBP
|
1 0
GBP
|
—
GBP
|
—
GBP
|
| Share issue related cost | — | — | — | — | — | — | — |
—
GBP
|
2 , 9 6 0
GBP
|
—
GBP
|
—
GBP
|
2, 9 60
GBP
|
—
GBP
|
—
GBP
|