Statement Of Comprehensive Income [Abstract]
| Concept |
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 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
10,942,000
GBP
|
10,942,000
GBP
|
–
GBP
|
13,315,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
13,315,000
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract] | ||||||||||||||
| Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans | — | — | — | — |
1,381,000
GBP
|
— | — |
8,273,000
GBP
|
— | — | — | — | — | — |
| Other comprehensive income that will not be reclassified to profit or loss, net of tax | — | — | — | — |
1,036,000
GBP
|
— | — |
6,205,000
GBP
|
— | — | — | — | — | — |
| Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract] | ||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||
| Gains (losses) on exchange differences on translation of foreign operations, net of tax | — | — | — | — |
6,188,000
GBP
|
— | — |
11,461,000
GBP
|
— | — | — | — | — | — |
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations | — | — | — | — |
33,000
GBP
|
— | — |
102,000
GBP
|
— | — | — | — | — | — |
| Cash flow hedges [abstract] | ||||||||||||||
| Gains (losses) on cash flow hedges, net of tax |
–
GBP
|
–
GBP
|
–
GBP
|
269,000
GBP
|
269,000
GBP
|
–
GBP
|
–
GBP
|
23,000
GBP
|
–
GBP
|
–
GBP
|
23,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Reclassification adjustments on cash flow hedges, net of tax | — | — | — | — |
–
GBP
|
— | — |
4,000
GBP
|
— | — | — | — | — | — |
| Hedges of net investment in foreign operations [abstract] | ||||||||||||||
| Gains (losses) on hedges of net investments in foreign operations, net of tax |
–
GBP
|
–
GBP
|
6,188,000
GBP
|
–
GBP
|
6,188,000
GBP
|
–
GBP
|
–
GBP
|
11,461,000
GBP
|
11,461,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Other comprehensive income that will be reclassified to profit or loss, net of tax | — | — | — | — |
5,651,000
GBP
|
— | — |
11,544,000
GBP
|
— | — | — | — | — | — |
| Other comprehensive income | — | — | — | — |
4,615,000
GBP
|
— | — |
17,749,000
GBP
|
— | — | — | — | — | — |
| Comprehensive income |
–
GBP
|
–
GBP
|
5,920,000
GBP
|
269,000
GBP
|
6,327,000
GBP
|
11,978,000
GBP
|
–
GBP
|
31,064,000
GBP
|
11,563,000
GBP
|
–
GBP
|
19,000
GBP
|
–
GBP
|
–
GBP
|
19,520,000
GBP
|