Statement Of Cash Flows [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
345 .3
GBP
|
345,300,000
GBP
|
–
GBP
|
196 .3
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
196,300,000
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
| Cash flows from (used in) operations | — | — | — | — | — | — | — | — | — | — | — |
3 4 4.4
GBP
|
— | — |
1 , 1 9 7. 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Income taxes paid (refund), classified as operating activities | — | — | — | — | — | — | — | — | — | — | — |
117 .3
GBP
|
— | — |
12 8.8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Cash flows from (used in) operating activities | — | — | — | — | — | — | — | — | — | — | — |
461 .7
GBP
|
— | — |
1,326 .3
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||||||||||||||
| Interest received, classified as investing activities | — | — | — | — | — | — | — | — | — | — | — |
1 .9
GBP
|
— | — |
7. 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Cash flows from (used in) investing activities | — | — | — | — | — | — | — | — | — | — | — |
8 0.6
GBP
|
— | — |
7 55.8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||||||||||||
| Payments from changes in ownership interests in subsidiaries that do not result in loss of control | — | — | — | — | — | — | — | — | — | — | — |
6 3 .5
GBP
|
— | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Proceeds from issuing shares | — | — | — | — | — | — | — | — | — | — | — |
800,000
GBP
|
— | — |
2,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Proceeds from borrowings, classified as financing activities | — | — | — | — | — | — | — | — | — | — | — |
5,058,600,000
GBP
|
— | — |
1,991,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Repayments of borrowings, classified as financing activities | — | — | — | — | — | — | — | — | — | — | — |
4,295,400,000
GBP
|
— | — |
1,1 0 3 .6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Payments of lease liabilities, classified as financing activities | — | — | — | — | — | — | — | — | — | — | — |
1,900,000
GBP
|
— | — |
2 .0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Dividends paid, classified as financing activities | — | — | — | — | — | — | — | — | — | — | — |
86 .7
GBP
|
— | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Interest paid, classified as financing activities | — | — | — | — | — | — | — | — | — | — | — |
8 .4
GBP
|
— | — |
2 1.4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Cash flows from (used in) financing activities | — | — | — | — | — | — | — | — | — | — | — |
7 4 7. 2
GBP
|
— | — |
838,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — | — | — | — | — | — | — | — | — | — | — |
3 6 6 .1
GBP
|
— | — |
2 6 7. 8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — |
2, 736.7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2, 370 .6
GBP
|
— | — | — | — |
2, 102.8
GBP
|