Statement Of Changes In Equity [Abstract]
| Concept |
2021-03-01 to 2022-02-28 |
2021-03-01 to 2022-02-28 |
2021-03-01 to 2022-02-28 |
2021-03-01 to 2022-02-28 |
2021-03-01 to 2022-02-28 |
2021-03-01 to 2022-02-28 |
2021-03-01 to 2022-02-28 |
2021-03-01 to 2022-02-28 |
2021-03-01 to 2022-02-28 |
2020-03-01 to 2021-02-28 |
2020-03-01 to 2021-02-28 |
2020-03-01 to 2021-02-28 |
2020-03-01 to 2021-02-28 |
2020-03-01 to 2021-02-28 |
2020-03-01 to 2021-02-28 |
2020-03-01 to 2021-02-28 |
2020-03-01 to 2021-02-28 |
2020-03-01 to 2021-02-28 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||
| Dividends recognised as distributions to owners of parent |
–
GBP
|
15,157,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
15,157,000
GBP
|
–
GBP
|
1,045,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,045,000
GBP
|
–
GBP
|
| Increase (decrease) through exercise of options, equity |
–
GBP
|
2,050,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
2,084,000
GBP
|
34,000
GBP
|
–
GBP
|
1,114,000
GBP
|
–
GBP
|
1,298,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
184,000
GBP
|
–
GBP
|
| Decrease (increase) through tax on share-based payment transactions, equity |
–
GBP
|
408,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
408,000
GBP
|
–
GBP
|
3,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
3,000
GBP
|
–
GBP
|
| Increase (decrease) through transactions with owners, equity |
1,547,000
GBP
|
16,799,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
2,405,000
GBP
|
17,657,000
GBP
|
–
GBP
|
2,187,000
GBP
|
7,931,000
GBP
|
624,000
GBP
|
–
GBP
|
78,000
GBP
|
–
GBP
|
–
GBP
|
7,667,000
GBP
|
1,221,000
GBP
|
| Purchase of treasury shares |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
4,489,000
GBP
|
4,489,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
674,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
674,000
GBP
|
–
GBP
|