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 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 2022-03-31 |
As at 2021-03-31 |
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] | |||||||||||||||
| Property, plant and equipment | — | — |
400,000
GBP
|
— | — | — | — | — |
700,000
GBP
|
— | — | — | — | — | — |
| Right-of-use assets | — | — |
900,000
GBP
|
— | — | — | — | — |
200,000
GBP
|
— | — | — | — | — | — |
| Investment property | — | — |
627,300,000
GBP
|
— | — | — | — | — |
684,600,000
GBP
|
— | — | — | — | — | — |
| Cash and cash equivalents | — | — |
108,600,000
GBP
|
— | — | — | — | — |
82,800,000
GBP
|
— | — | — | — | — |
150,500,000
GBP
|
| Assets | — | — |
7 81.5
GBP
|
— | — | — | — | — |
819,100,000
GBP
|
— | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital | — | — |
3,100,000
GBP
|
— | — | — | — | — |
3,100,000
GBP
|
— | — | — | — | — | — |
| Share premium | — | — |
2,400,000
GBP
|
— | — | — | — | — |
1,100,000
GBP
|
— | — | — | — | — | — |
| Equity |
375,400,000
GBP
|
2,300,000
GBP
|
378,600,000
GBP
|
2,400,000
GBP
|
3,100,000
GBP
|
3,100,000
GBP
|
2,300,000
GBP
|
1,100,000
GBP
|
414,100,000
GBP
|
412,200,000
GBP
|
232,200,000
GBP
|
2,300,000
GBP
|
3,100,000
GBP
|
227,400,000
GBP
|
460,400,000
GBP
|