Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
400,000
GBP
|
700,000
GBP
|
— |
| Investment property [abstract] | |||
| Investment property |
627,300,000
GBP
|
684,600,000
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in joint ventures reported in separate financial statements |
23,800,000
GBP
|
24,000,000
GBP
|
— |
| Investments in associates reported in separate financial statements |
5,500,000
GBP
|
7,900,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
15,000,000
GBP
|
18,900,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
108,600,000
GBP
|
82,800,000
GBP
|
150,500,000
GBP
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
296,700,000
GBP
|
295,800,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
29,500,000
GBP
|
33,500,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
3,100,000
GBP
|
3,100,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Merger reserve |
2,300,000
GBP
|
2,300,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
7 81.5
GBP
|
819,100,000
GBP
|
— |
| Assets (liabilities) |
378,600,000
GBP
|
414,100,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
123,600,000
GBP
|
101,700,000
GBP
|
— |
| Current liabilities |
29,900,000
GBP
|
34,200,000
GBP
|
— |
| Assets less current liabilities [abstract] |