Analysis Of Income And Expense [Abstract]
| Concept |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||
| Revenue [abstract] | ||||||||||||||||
| Revenue | — | — |
470 . 4
GBP
|
— | — |
–
GBP
|
470. 4
GBP
|
— |
–
GBP
|
444,700,000
GBP
|
— | — | — | — | — |
444,700,000
GBP
|
| Material income and expense [abstract] | ||||||||||||||||
| Research and development expense | — | — |
3 9.1
GBP
|
— | — |
–
GBP
|
3 9.1
GBP
|
— |
0. 8
GBP
|
35 .9
GBP
|
— | — | — | — | — |
36 .7
GBP
|
| Other operating income (expense) | — | — |
3,300,000
GBP
|
— | — |
3,300,000
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
— | — | — | — | — |
–
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
|
4,800,000
GBP
|
–
GBP
|
–
GBP
|
— | — |
4,800,000
GBP
|
— | — |
9,700,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
9. 7
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income, attributable to owners of parent |
–
GBP
|
5. 5
GBP
|
3 0.6
GBP
|
–
GBP
|
–
GBP
|
— | — |
36,100,000
GBP
|
— | — |
29. 7
GBP
|
–
GBP
|
5,300,000
GBP
|
–
GBP
|
–
GBP
|
3 5.0
GBP
|