Statement Of Comprehensive Income [Abstract]
| Concept |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||
| Profit (loss) |
186,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
186,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
153,900,000
GBP
|
153,900,000
GBP
|
-
GBP
|
-
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract] | ||||||||||||||
| Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans | — | — | — | — |
7,200,000
GBP
|
— | — | — | — | — |
2,400,000
GBP
|
— | — | — |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||||
| Income tax relating to remeasurements of defined benefit plans included in other comprehensive income | — | — | — | — |
1,800,000
GBP
|
— | — | — | — | — |
800,000
GBP
|
— | — | — |
| Other comprehensive income |
5,400,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
5,400,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
1,600,000
GBP
|
1,600,000
GBP
|
-
GBP
|
-
GBP
|
| Comprehensive income |
191,400,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
191,400,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
155,500,000
GBP
|
155,500,000
GBP
|
-
GBP
|
-
GBP
|