Statement Of Financial Position [Abstract]
| Concept |
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 |
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 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Property, plant and equipment | — | — |
54,000,000
GBP
|
22,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
23,700,000
GBP
|
— | — | — | — | — | — | — | — |
50,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Investment property | — | — |
5,359,900,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — |
5,029,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Investments accounted for using equity method | — | — |
51,100,000
GBP
|
1,749,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,615,900,000
GBP
|
— | — | — | — | — | — | — | — |
900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — |
300,000
GBP
|
3,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
3,100,000
GBP
|
— | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets | — | — |
5,626,400,000
GBP
|
1,777,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,642,700,000
GBP
|
— | — | — | — | — | — | — | — |
5,226,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Trade and other current receivables | — | — |
61,700,000
GBP
|
1,898,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,682,300,000
GBP
|
— | — | — | — | — | — | — | — |
76,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax assets, current | — | — |
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
400,000
GBP
|
— | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — |
68,500,000
GBP
|
68,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
50,100,000
GBP
|
— | — | — | — | — | — | — | — |
50,700,000
GBP
|
— | — | — | — | — |
54,500,000
GBP
|
54,000,000
GBP
|
— | — | — | — | — | — | — |
| Current assets | — | — |
162,800,000
GBP
|
1,967,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,732,800,000
GBP
|
— | — | — | — | — | — | — | — |
139,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets | — | — |
5,892,000,000
GBP
|
3,744,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
3,375,500,000
GBP
|
— | — | — | — | — | — | — | — |
5,531,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Issued capital | — | — |
5,600,000
GBP
|
5,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
5,600,000
GBP
|
— | — | — | — | — | — | — | — |
5,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — |
3,299,700,000
GBP
|
255,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
321,200,000
GBP
|
— | — | — | — | — | — | — | — |
3,124,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium | — | — |
195,400,000
GBP
|
195,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
193,700,000
GBP
|
— | — | — | — | — | — | — | — |
193,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves | — | — |
941,100,000
GBP
|
925,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
926,300,000
GBP
|
— | — | — | — | — | — | — | — |
939,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — |
4,441,800,000
GBP
|
1,382,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,446,800,000
GBP
|
— | — | — | — | — | — | — | — |
4,263,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — |
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — |
51,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
3,299,700,000
GBP
|
941,100,000
GBP
|
4,441,800,000
GBP
|
1,382,300,000
GBP
|
925,600,000
GBP
|
–
GBP
|
1,382,300,000
GBP
|
195,400,000
GBP
|
5,600,000
GBP
|
255,700,000
GBP
|
4,441,800,000
GBP
|
–
GBP
|
195,400,000
GBP
|
5,600,000
GBP
|
3,124,500,000
GBP
|
51,900,000
GBP
|
4,263,200,000
GBP
|
5,600,000
GBP
|
1,446,800,000
GBP
|
–
GBP
|
1,446,800,000
GBP
|
5,600,000
GBP
|
926,300,000
GBP
|
321,200,000
GBP
|
193,700,000
GBP
|
939,400,000
GBP
|
193,700,000
GBP
|
4,315,100,000
GBP
|
4,421,200,000
GBP
|
55,700,000
GBP
|
936,200,000
GBP
|
403,700,000
GBP
|
5,600,000
GBP
|
4,476,900,000
GBP
|
1,525,600,000
GBP
|
–
GBP
|
193,000,000
GBP
|
1,525,600,000
GBP
|
193,000,000
GBP
|
923,300,000
GBP
|
3,286,400,000
GBP
|
5,600,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Non-current provisions | — | — |
300,000
GBP
|
300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
400,000
GBP
|
— | — | — | — | — | — | — | — |
400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities | — | — |
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — |
500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities | — | — |
1,257,200,000
GBP
|
1,078,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
854,000,000
GBP
|
— | — | — | — | — | — | — | — |
1,108,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Current provisions | — | — |
300,000
GBP
|
300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
600,000
GBP
|
— | — | — | — | — | — | — | — |
600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables | — | — |
128,300,000
GBP
|
1,281,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,072,900,000
GBP
|
— | — | — | — | — | — | — | — |
106,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax liabilities, current | — | — |
500,000
GBP
|
700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — |
500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities | — | — |
193,000,000
GBP
|
1,284,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,074,700,000
GBP
|
— | — | — | — | — | — | — | — |
107,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — |
1,450,200,000
GBP
|
2,362,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,928,700,000
GBP
|
— | — | — | — | — | — | — | — |
1,216,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |