Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Adjustments for finance income |
10,400,000
GBP
|
1,600,000
GBP
|
| Adjustments for decrease (increase) in trade and other receivables |
3,500,000
GBP
|
12,100,000
GBP
|
| Adjustments for increase (decrease) in trade and other payables |
600,000
GBP
|
2,900,000
GBP
|
| Adjustments for increase (decrease) in deferred income including contract liabilities [abstract] | ||
| Adjustments for increase (decrease) in deferred income other than contract liabilities |
3,900,000
GBP
|
3,900,000
GBP
|
| Adjustments for amortisation expense |
—
GBP
|
1,700,000
GBP
|
| Adjustments for gains (losses) on fair value adjustment, investment property |
38,100,000
GBP
|
759,500,000
GBP
|
| Adjustments for gains (losses) on change in fair value of derivatives |
11,200,000
GBP
|
14,900,000
GBP
|
| Adjustments for undistributed profits of investments accounted for using equity method |
400,000
GBP
|
500,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||
| Dividends received from joint ventures, classified as investing activities |
800,000
GBP
|
500,000
GBP
|
| Purchase of interests in investments accounted for using equity method |
66,600,000
GBP
|
—
GBP
|
| Purchase of investment property |
308,900,000
GBP
|
286,800,000
GBP
|
| Proceeds from sales of investment property |
326,800,000
GBP
|
—
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from issue of ordinary shares |
49,600,000
GBP
|
2,300,000
GBP
|
| Payments for debt issue costs |
5,100,000
GBP
|
1,400,000
GBP
|