Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Land and buildings [abstract] | |||
| Land |
201,500,000
GBP
|
228,100,000
GBP
|
— |
| Other property, plant and equipment |
4,000,000
GBP
|
9,400,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
1,700,000
GBP
|
2,000,000
GBP
|
— |
| Investment property [abstract] | |||
| Investment property |
5,249,100,000
GBP
|
4,053,500,000
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in joint ventures accounted for using equity method |
25,600,000
GBP
|
28,500,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
2,000,000
GBP
|
2,000,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current derivative financial assets |
1,800,000
GBP
|
100,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
37,100,000
GBP
|
25,100,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash |
71,100,000
GBP
|
57,800,000
GBP
|
— |
| Cash and cash equivalents |
70,900,000
GBP
|
57,600,000
GBP
|
21,200,000
GBP
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
207,600,000
GBP
|
206,700,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Trade and other non-current payables |
2,000,000
GBP
|
2,000,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
85,900,000
GBP
|
69,300,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current derivative financial liabilities |
–
GBP
|
1,100,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
18,700,000
GBP
|
17,200,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
2,331,300,000
GBP
|
1,358,700,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
964,500,000
GBP
|
1,078,900,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
5,593,900,000
GBP
|
4,406,500,000
GBP
|
— |
| Liabilities |
1,517,400,000
GBP
|
1,485,200,000
GBP
|
— |
| Assets (liabilities) |
4,076,500,000
GBP
|
2,921,300,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
108,200,000
GBP
|
82,900,000
GBP
|
— |
| Current liabilities |
128,800,000
GBP
|
107,300,000
GBP
|
— |
| Assets less current liabilities [abstract] |