Statement Of Changes In Equity [Abstract]
| Concept |
As at 2023-05-31 |
As at 2023-05-31 |
2022-06-01 to 2023-05-31 |
As at 2023-05-31 |
As at 2023-05-31 |
As at 2023-05-31 |
2022-06-01 to 2023-05-31 |
2022-06-01 to 2023-05-31 |
2022-06-01 to 2023-05-31 |
2022-06-01 to 2023-05-31 |
2022-06-01 to 2023-05-31 |
As at 2023-05-31 |
As at 2023-05-31 |
2022-06-01 to 2023-05-31 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity |
3 .1
GBP
|
28,800,000
GBP
|
— |
3 7. 5
GBP
|
—
GBP
|
278. 2
GBP
|
— | — | — | — | — |
2 2 4 .1
GBP
|
42,300,000
GBP
|
— |
—
GBP
|
— |
42,300,000
GBP
|
35,100,000
GBP
|
— | — |
3. 1
GBP
|
224,000,000
GBP
|
11. 3
GBP
|
— | — |
293,200,000
GBP
|
— | — |
20,300,000
GBP
|
3 .1
GBP
|
266 .2
GBP
|
223 .2
GBP
|
42. 3
GBP
|
0. 8
GBP
|
21,900,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — |
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
4 . 6
GBP
|
—
GBP
|
—
GBP
|
— | — |
4. 6
GBP
|
— |
23. 0
GBP
|
— | — |
—
GBP
|
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
— |
23,000,000
GBP
|
—
GBP
|
— | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,400,000
GBP
|
— |
14. 7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — |
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
4 .6
GBP
|
2,400,000
GBP
|
—
GBP
|
— | — |
2. 2
GBP
|
— |
3 7 . 7
GBP
|
— | — |
—
GBP
|
14 . 8
GBP
|
— | — | — |
0 .1
GBP
|
—
GBP
|
— |
23,000,000
GBP
|
—
GBP
|
— | — | — | — | — | — | — |
| Issue of equity | — | — |
—
GBP
|
— | — | — |
—
GBP
|
0 .1
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
— | — |
0 .1
GBP
|
— |
0. 8
GBP
|
— | — |
800,000
GBP
|
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — |
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
14 .5
GBP
|
—
GBP
|
—
GBP
|
— | — |
14 .5
GBP
|
— |
14. 4
GBP
|
— | — |
—
GBP
|
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
— |
14 .4
GBP
|
—
GBP
|
— | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — |
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
500,000
GBP
|
—
GBP
|
—
GBP
|
— | — |
500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — |
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
2,200,000
GBP
|
—
GBP
|
—
GBP
|
— | — |
2,200,000
GBP
|
— |
3,200,000
GBP
|
— | — |
—
GBP
|
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
— |
3,200,000
GBP
|
—
GBP
|
— | — | — | — | — | — | — |