Statement Of Financial Position [Abstract]
| Concept |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||
| Assets [abstract] | ||||||||||||
| Investment property |
388,0 30
GBP
|
— | — | — | — | — |
433,486,000
GBP
|
— | — | — | — | — |
| Cash and cash equivalents |
8, 41 9
GBP
|
— | — | — | — | — |
1 1,601
GBP
|
— | — | — |
1 2 ,1 7 5
GBP
|
— |
| Assets |
490,26 2
GBP
|
— | — | — | — | — |
544, 956
GBP
|
— | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||
| Equity [abstract] | ||||||||||||
| Treasury shares |
3 7,1 0 1
GBP
|
— | — | — | — | — |
36,103,000
GBP
|
— | — | — | — | — |
| Equity |
300,6 89
GBP
|
219 ,090
GBP
|
3 7,1 0 1
GBP
|
1 18 ,70 0
GBP
|
219, 090
GBP
|
1 8 9,1 9 6
GBP
|
3 7 2 ,1 8 3
GBP
|
3 6 ,1 0 3
GBP
|
35,967,000
GBP
|
113,721,000
GBP
|
296,844,000
GBP
|
219, 090
GBP
|
| Liabilities [abstract] | ||||||||||||
| Liabilities |
18 9, 57 3
GBP
|
— | — | — | — | — |
173,670,000
GBP
|
— | — | — | — | — |
| Equity and liabilities |
49 0, 262
GBP
|
— | — | — | — | — |
544,956,000
GBP
|
— | — | — | — | — |