Statement Of Changes In Equity [Abstract]
| Concept |
As at 2022-05-31 |
2021-06-01 to 2022-05-31 |
As at 2022-05-31 |
As at 2022-05-31 |
2021-06-01 to 2022-05-31 |
2021-06-01 to 2022-05-31 |
As at 2022-05-31 |
As at 2022-05-31 |
As at 2022-05-31 |
2021-06-01 to 2022-05-31 |
2021-06-01 to 2022-05-31 |
As at 2022-05-31 |
2021-06-01 to 2022-05-31 |
2021-06-01 to 2022-05-31 |
2020-06-01 to 2021-05-31 |
2020-06-01 to 2021-05-31 |
2020-06-01 to 2021-05-31 |
2020-06-01 to 2021-05-31 |
2020-06-01 to 2021-05-31 |
2020-06-01 to 2021-05-31 |
2020-06-01 to 2021-05-31 |
As at 2021-05-31 |
As at 2021-05-31 |
As at 2021-05-31 |
As at 2021-05-31 |
As at 2021-05-31 |
As at 2021-05-31 |
As at 2021-05-31 |
As at 2020-05-31 |
As at 2020-05-31 |
As at 2020-05-31 |
As at 2020-05-31 |
As at 2020-05-31 |
As at 2020-05-31 |
As at 2020-05-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity |
–
GBP
|
— |
42,300,000
GBP
|
35,100,000
GBP
|
— | — |
3,100,000
GBP
|
224,000,000
GBP
|
11,300,000
GBP
|
— | — |
293,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
20,300,000
GBP
|
3,100,000
GBP
|
266,200,000
GBP
|
223,200,000
GBP
|
42,300,000
GBP
|
800,000
GBP
|
21,900,000
GBP
|
150,900,000
GBP
|
2,800,000
GBP
|
42,300,000
GBP
|
–
GBP
|
31,900,000
GBP
|
22,000,000
GBP
|
205,900,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
23,000,000
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
–
GBP
|
— |
23,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
10,000,000
GBP
|
10,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — |
14,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
800,000
GBP
|
–
GBP
|
11,600,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
12,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — |
37,700,000
GBP
|
— | — |
–
GBP
|
14,800,000
GBP
|
— | — | — |
100,000
GBP
|
–
GBP
|
— |
23,000,000
GBP
|
–
GBP
|
800,000
GBP
|
–
GBP
|
11,600,000
GBP
|
–
GBP
|
–
GBP
|
10,000,000
GBP
|
2,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Issue of equity | — |
800,000
GBP
|
— | — |
800,000
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
72,300,000
GBP
|
–
GBP
|
–
GBP
|
300,000
GBP
|
–
GBP
|
72,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
14,400,000
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
–
GBP
|
— |
14,400,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
13,000,000
GBP
|
13,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
3,200,000
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
–
GBP
|
— |
3,200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
2,800,000
GBP
|
2,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |