Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Land and buildings [abstract] | |||
| Land |
157,400,000
GBP
|
201,500,000
GBP
|
— |
| Other property, plant and equipment |
2,300,000
GBP
|
4,000,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
1,400,000
GBP
|
1,700,000
GBP
|
— |
| Investment property [abstract] | |||
| Investment property |
4,847,300,000
GBP
|
5,249,100,000
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in joint ventures accounted for using equity method |
27,200,000
GBP
|
25,600,000
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 |
19,900,000
GBP
|
1,800,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
24,900,000
GBP
|
37,100,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash |
47,600,000
GBP
|
71,100,000
GBP
|
— |
| Cash and cash equivalents |
47,400,000
GBP
|
70,900,000
GBP
|
57,600,000
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 |
25,100,000
GBP
|
—
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
474,800,000
GBP
|
207,600,000
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] | |||
| Current accruals and current deferred income including current contract liabilities [abstract] | |||
| Current deferred income including current contract liabilities [abstract] | |||
| Current deferred income including current contract liabilities |
34,700,000
GBP
|
38,600,000
GBP
|
— |
| Trade and other current payables |
111,200,000
GBP
|
85,900,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
18,700,000
GBP
|
18,700,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1,731,900,000
GBP
|
2,331,300,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
835,100,000
GBP
|
964,500,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
5,155,100,000
GBP
|
5,593,900,000
GBP
|
— |
| Liabilities |
1,805,100,000
GBP
|
1,517,400,000
GBP
|
— |
| Assets (liabilities) |
3,350,000,000
GBP
|
4,076,500,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
97,600,000
GBP
|
108,200,000
GBP
|
— |
| Current liabilities |
147,000,000
GBP
|
128,800,000
GBP
|
— |
| Assets less current liabilities [abstract] |