Statement Of Comprehensive Income [Abstract]
| Concept |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||
| Profit (loss) |
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
308,500,000
GBP
|
308,500,000
GBP
|
226,400,000
GBP
|
—
GBP
|
226,400,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||
| Other comprehensive income |
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
8,500,000
GBP
|
8,500,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
3,300,000
GBP
|
3,300,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
| Comprehensive income |
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
8,500,000
GBP
|
317,000,000
GBP
|
308,500,000
GBP
|
226,400,000
GBP
|
—
GBP
|
223,100,000
GBP
|
3,300,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|