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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||||||||||||||
| Property, plant and equipment | — | — | — |
1,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — |
3,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
6,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Investment property | — | — | — |
1,561,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,152,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current receivables | — | — | — |
19,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
3,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets | — | — | — |
4,367,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
5,353,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||||||||||||||
| Trade and other current receivables | — | — | — |
84,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
105,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
309,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
409,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets other than non-current assets or disposal groups classified as held for sale or as held for distribution to owners | — | — | — |
475,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
552,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners | — | — | — |
71,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets | — | — | — |
546,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
552,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — |
4,913,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
5,90 6.3
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||||||||
| Issued capital | — | — | — |
221,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
202,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — |
243,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
663,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium | — | — | — |
1,593,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,611,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Treasury shares | — | — | — |
3,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves | — | — | — |
207,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
207,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — |
2,745,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
3,208,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — | — |
100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
3,500,000
GBP
|
243,500,000
GBP
|
207,600,000
GBP
|
2,746,000,000
GBP
|
1,700,000
GBP
|
362,800,000
GBP
|
374,100,000
GBP
|
2,745,900,000
GBP
|
1,593,200,000
GBP
|
100,000
GBP
|
471,100,000
GBP
|
221,000,000
GBP
|
663,000,000
GBP
|
100,000
GBP
|
3,400,000
GBP
|
3,208,800,000
GBP
|
202,900,000
GBP
|
374,100,000
GBP
|
400,000
GBP
|
666,000,000
GBP
|
207,100,000
GBP
|
1,611 .9
GBP
|
3,208,900,000
GBP
|
519,200,000
GBP
|
4,377 .0
GBP
|
200,000
GBP
|
25,600,000
GBP
|
5 20.9
GBP
|
1,266,000,000
GBP
|
4,377,200,000
GBP
|
374,100,000
GBP
|
2,433,200,000
GBP
|
2,200,000
GBP
|
1,400,000
GBP
|
191,600,000
GBP
|
430,800,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||||||||||||||
| Trade and other non-current payables | — | — | — |
56,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
103,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities | — | — | — |
400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — |
1,987,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,373,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||||||||||||||
| Trade and other current payables | — | — | — |
179,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
205,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities | — | — | — |
180,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
323,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — |
2,167,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,697,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |