Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2022-01-01 to 2023-12-31 |
2022-01-01 to 2023-12-31 |
2022-01-01 to 2023-12-31 |
2022-01-01 to 2023-12-31 |
2022-01-01 to 2023-12-31 |
2022-01-01 to 2023-12-31 |
2022-01-01 to 2023-12-31 |
2022-01-01 to 2023-12-31 |
2022-01-01 to 2023-12-31 |
2022-01-01 to 2023-12-31 |
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 |
As at 2022-01-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||||||||||||||
| Profit (loss) | — | — |
—
GBP
|
222,900,000
GBP
|
222,900,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
222,900,000
GBP
|
— |
—
GBP
|
—
GBP
|
231,900,000
GBP
|
231,900,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
231,900,000
GBP
|
—
GBP
|
— |
| Cash flows from (used in) operating activities |
404,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
800,200,000
GBP
|
— | — | — | — | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | ||||||||||||||||||||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities |
520,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
— | — | — | — | — | — | — | — |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities |
600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
— | — | — | — | — | — | — | — |
| Purchase of property, plant and equipment, classified as investing activities |
18,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
11,700,000
GBP
|
— | — | — | — | — | — | — | — |
| Purchase of intangible assets, classified as investing activities |
124,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
108,400,000
GBP
|
— | — | — | — | — | — | — | — |
| Cash flows from (used in) investing activities |
398,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
100,800,000
GBP
|
— | — | — | — | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | ||||||||||||||||||||||||
| Payments to acquire or redeem entity's shares |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
50,100,000
GBP
|
— | — | — | — | — | — | — | — |
| Payments of lease liabilities, classified as financing activities |
10,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
8,900,000
GBP
|
— | — | — | — | — | — | — | — |
| Dividends paid, classified as financing activities |
16,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
314,500,000
GBP
|
— | — | — | — | — | — | — | — |
| Interest paid, classified as financing activities |
14,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
23,000,000
GBP
|
— | — | — | — | — | — | — | — |
| Cash flows from (used in) financing activities |
51,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
657,500,000
GBP
|
— | — | — | — | — | — | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes |
751,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
41,900,000
GBP
|
— | — | — | — | — | — | — | — |
| Cash and cash equivalents | — |
1,772,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,003,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
955,700,000
GBP
|