Statement Of Changes In Equity [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
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 |
As at 2022-12-31 |
As at 2022-12-31 |
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 |
As at 2022-12-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||
| Equity | — | — |
2,290,729,000
GBP
|
593,019,000
GBP
|
1,290,439,000
GBP
|
1,258,000
GBP
|
372,224,000
GBP
|
11,443,000
GBP
|
22,346,000
GBP
|
— | — |
1,175,712,000
GBP
|
23,865,000
GBP
|
2,089,965,000
GBP
|
— | — | — |
372,224,000
GBP
|
1,258,000
GBP
|
11,443,000
GBP
|
— | — | — | — |
505,463,000
GBP
|
1,248,000
GBP
|
2,005,724,000
GBP
|
712,188,000
GBP
|
885,821,000
GBP
|
35,114,000
GBP
|
359,971,000
GBP
|
11,382,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||
| Profit (loss) |
87,556,000
GBP
|
230,517,000
GBP
|
— | — | — | — | — | — | — |
28,234,000
GBP
|
114,727,000
GBP
|
— | — | — | — |
107,484,000
GBP
|
— | — | — | — |
24,318,000
GBP
|
289,891,000
GBP
|
206,725,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Issue of equity | — |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
71,000
GBP
|
12,324,000
GBP
|
— | — | — | — | — | — | — |
12,253,000
GBP
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
29,753,000
GBP
|
— | — | — | — | — | — | — |
29,753,000
GBP
|
— | — | — | — | — |
34,217,000
GBP
|
— | — | — | — |
34,217,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
10,000
GBP
|
1,350,000
GBP
|
10,000
GBP
|
— | — | — |
1,350,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |