Analysis Of Income And Expense [Abstract]
| Concept |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||
| Revenue [abstract] | ||||||||||||||||
| Revenue | — | — | — | — | — |
—
GBP
|
3 6 7. 3
GBP
|
3 6 7. 3
GBP
|
—
GBP
|
318. 5
GBP
|
— | — | — | — | — |
318 .5
GBP
|
| Material income and expense [abstract] | ||||||||||||||||
| Research and development expense | — | — | — | — | — |
—
GBP
|
32 .8
GBP
|
32 .8
GBP
|
1 .3
GBP
|
30,000,000
GBP
|
— | — | — | — | — |
31 . 3
GBP
|
| Other finance income | — | — | — | — | — |
—
GBP
|
100,000
GBP
|
0. 1
GBP
|
—
GBP
|
0. 2
GBP
|
— | — | — | — | — |
0. 2
GBP
|
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss |
—
GBP
|
—
GBP
|
6 .8
GBP
|
—
GBP
|
—
GBP
|
— | — |
6. 8
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
5. 5
GBP
|
5,500,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income, attributable to owners of parent |
—
GBP
|
1 .0
GBP
|
59. 1
GBP
|
—
GBP
|
—
GBP
|
— | — |
60. 1
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
4,900,000
GBP
|
16. 5
GBP
|
11 .6
GBP
|