Statement Of Changes In Equity [Abstract]
| Concept |
2022-07-01 to 2023-06-30 |
As at 2023-06-30 |
2022-07-01 to 2023-06-30 |
2022-07-01 to 2023-06-30 |
As at 2023-06-30 |
As at 2023-06-30 |
2022-07-01 to 2023-06-30 |
As at 2023-06-30 |
As at 2022-06-30 |
2021-07-01 to 2022-06-30 |
As at 2022-06-30 |
2021-07-01 to 2022-06-30 |
2021-07-01 to 2022-06-30 |
As at 2022-06-30 |
2021-07-01 to 2022-06-30 |
As at 2022-06-30 |
As at 2021-06-30 |
As at 2021-06-30 |
As at 2021-06-30 |
As at 2021-06-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||
| Equity | — |
1,500,000
GBP
|
— | — |
48,500,000
GBP
|
21,800,000
GBP
|
— |
68,800,000
GBP
|
1,700,000
GBP
|
— |
48,300,000
GBP
|
— | — |
22,200,000
GBP
|
— |
68,800,000
GBP
|
24,700,000
GBP
|
48,300,000
GBP
|
68,800,000
GBP
|
4,200,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||
| Comprehensive income |
5,700,000
GBP
|
— |
-
GBP
|
-
GBP
|
— | — |
5,700,000
GBP
|
— | — |
3,600,000
GBP
|
— |
-
GBP
|
-
GBP
|
— |
3,600,000
GBP
|
— | — | — | — | — |
| Dividends recognised as distributions to owners |
5,900,000
GBP
|
— |
-
GBP
|
-
GBP
|
— | — |
5,900,000
GBP
|
— | — |
6,100,000
GBP
|
— |
-
GBP
|
-
GBP
|
— |
6,100,000
GBP
|
— | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
-
GBP
|
— |
-
GBP
|
200,000
GBP
|
— | — |
200,000
GBP
|
— | — |
-
GBP
|
— |
-
GBP
|
-
GBP
|
— |
-
GBP
|
— | — | — | — | — |