Statement Of Cash Flows [Abstract]
| Concept |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||||||||||||||||
| Profit (loss) | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
106,000,000
GBP
|
–
GBP
|
103,000,000
GBP
|
3,000,000
GBP
|
–
GBP
|
–
GBP
|
103,000,000
GBP
|
–
GBP
|
3,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
5,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
8,000,000
GBP
|
5,000,000
GBP
|
| Cash flows from (used in) operating activities | — | — | — | — | — |
32 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
111,000,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | ||||||||||||||||||||||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
451,000,000
GBP
|
— |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — | — | — | — |
12,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— |
| Purchase of property, plant and equipment, classified as investing activities | — | — | — | — | — |
1 8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
23,000,000
GBP
|
— |
| Purchase of intangible assets, classified as investing activities | — | — | — | — | — |
35,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
35,000,000
GBP
|
— |
| Interest received, classified as investing activities | — | — | — | — | — |
7,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,000,000
GBP
|
— |
| Cash flows from (used in) investing activities | — | — | — | — | — |
78,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
289,000,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | ||||||||||||||||||||||||||
| Proceeds from issuing shares | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
315,000,000
GBP
|
— |
| Payments to acquire or redeem entity's shares | — | — | — | — | — |
3,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,000,000
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
5,000,000
GBP
|
— |
| Payments of lease liabilities, classified as financing activities | — | — | — | — | — |
29,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
28,000,000
GBP
|
— |
| Cash flows from (used in) financing activities | — | — | — | — | — |
163,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
296,000,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — | — | — | — |
83,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
118,000,000
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — | — | — | — |
38,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— |
| Cash and cash equivalents |
888,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
784,000,000
GBP
|
— | — | — | — |