Statement Of Changes In Equity [Abstract]
| Concept |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||
| Increase (decrease) through exercise of options, equity |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,800,000
GBP
|
–
GBP
|
1,800,000
GBP
|
–
GBP
|
3,700,000
GBP
|
–
GBP
|
700,000
GBP
|
–
GBP
|
–
GBP
|
4,400,000
GBP
|
| Share issue related cost | — | — | — | — | — | — | — |
11,600,000
GBP
|
–
GBP
|
–
GBP
|
11,600,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|