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 |
4,400,000
GBP
|
2,900,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
2,000,000
GBP
|
1,900,000
GBP
|
— |
| Investment property [abstract] | |||
| Investment property |
2,643,300,000
GBP
|
2,366,700,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
45,800,000
GBP
|
23,500,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
18,500,000
GBP
|
49,000,000
GBP
|
191,000,000
GBP
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners |
123,000,000
GBP
|
65,900,000
GBP
|
— |
| Miscellaneous assets [abstract] | |||
| Investments other than investments accounted for using equity method |
2 .1
GBP
|
1 .7
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
859. 1
GBP
|
595,500,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
49,800,000
GBP
|
–
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
107 .8
GBP
|
85,800,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
191,600,000
GBP
|
181. 1
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1,219,500,000
GBP
|
1,300,300,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
2,839. 1
GBP
|
2,511,900,000
GBP
|
— |
| Liabilities |
1,051,400,000
GBP
|
712,300,000
GBP
|
— |
| Assets (liabilities) |
1,787,700,000
GBP
|
1, 799.6
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
187 .3
GBP
|
138,400,000
GBP
|
— |
| Current liabilities |
157 .6
GBP
|
85,800,000
GBP
|
— |
| Assets less current liabilities [abstract] |