Statement Of Comprehensive Income [Abstract]
| Concept |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||
| Profit (loss) |
200,000
GBP
|
–
GBP
|
200,000
GBP
|
–
GBP
|
6,621,000
GBP
|
–
GBP
|
6,621,000
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 |
4,330,000
GBP
|
— | — | — |
7,219,000
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 |
1,083,000
GBP
|
— | — | — |
1,804,000
GBP
|
— | — | — |
| Other comprehensive income |
3,247,000
GBP
|
–
GBP
|
3,247,000
GBP
|
–
GBP
|
5,415,000
GBP
|
–
GBP
|
5,415,000
GBP
|
–
GBP
|
| Comprehensive income |
3,447,000
GBP
|
–
GBP
|
3,447,000
GBP
|
–
GBP
|
12,036,000
GBP
|
–
GBP
|
12,036,000
GBP
|
–
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||
| Comprehensive income, attributable to owners of parent |
3,447,000
GBP
|
— | — | — |
12,036,000
GBP
|
— | — | — |