Statement Of Financial Position [Abstract]
| Concept |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||
| Property, plant and equipment | — | — | — | — |
500,000
GBP
|
— | — |
400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Investment property | — | — | — | — |
2,779 .3
GBP
|
— | — |
2,796,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Non-current assets | — | — | — | — |
2,786,900,000
GBP
|
— | — |
2,816,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||
| Trade and other current receivables | — | — | — | — |
24,900,000
GBP
|
— | — |
17 .8
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — |
3,200,000
GBP
|
— | — |
29 .1
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current assets | — | — | — | — |
40,000,000
GBP
|
— | — |
48,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — |
2,826,900,000
GBP
|
— | — |
2,864,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital | — | — | — | — |
167 .1
GBP
|
— | — |
167 .1
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — |
369 .1
GBP
|
— | — |
430,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Share premium | — | — | — | — |
479 .4
GBP
|
— | — |
479 .4
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity |
479 .4
GBP
|
167 .1
GBP
|
369 .1
GBP
|
415,300,000
GBP
|
1,423,900,000
GBP
|
7 .0
GBP
|
416,700,000
GBP
|
1,482,200,000
GBP
|
479 .4
GBP
|
430,100,000
GBP
|
167 .1
GBP
|
11,100,000
GBP
|
460,500,000
GBP
|
1,499 .9
GBP
|
15,600,000
GBP
|
474,900,000
GBP
|
166,600,000
GBP
|
413,500,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||
| Trade and other non-current payables | — | — | — | — |
4,100,000
GBP
|
— | — |
—
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities | — | — | — | — |
3,800,000
GBP
|
— | — |
5,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — | — |
1,331,800,000
GBP
|
— | — |
1,318,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||
| Trade and other current payables | — | — | — | — |
31,700,000
GBP
|
— | — |
32,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current liabilities | — | — | — | — |
71,200,000
GBP
|
— | — |
64,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — |
1,403,000,000
GBP
|
— | — |
1,382,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |