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 |
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 |
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 |
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 |
2021-08-01 to 2022-07-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||
| Profit (loss) |
–
GBP
|
81,100,000
GBP
|
–
GBP
|
81,100,000
GBP
|
–
GBP
|
–
GBP
|
81,100,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
165,200,000
GBP
|
–
GBP
|
165,200,000
GBP
|
165,200,000
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 | — |
5,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
100,000
GBP
|
— | — | — |
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — |
700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
500,000
GBP
|
— | — | — |
| Cash flow hedges [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, cash flow hedges | — |
17,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
30,600,000
GBP
|
— | — | — |
| Financial assets measured at fair value through other comprehensive income [abstract] | ||||||||||||||||||
| Gains (losses) on financial assets measured at fair value through other comprehensive income, before tax | — |
3,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,100,000
GBP
|
— | — | — |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — |
1,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
300,000
GBP
|
— | — | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — |
4,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
7,900,000
GBP
|
— | — | — |
| Other comprehensive income |
200,000
GBP
|
6,000,000
GBP
|
–
GBP
|
4,100,000
GBP
|
2,800,000
GBP
|
–
GBP
|
6,000,000
GBP
|
–
GBP
|
12,700,000
GBP
|
700,000
GBP
|
–
GBP
|
200,000
GBP
|
–
GBP
|
22,000,000
GBP
|
21,300,000
GBP
|
–
GBP
|
200,000
GBP
|
21,300,000
GBP
|
| Comprehensive income |
200,000
GBP
|
87,100,000
GBP
|
–
GBP
|
77,000,000
GBP
|
2,800,000
GBP
|
–
GBP
|
87,100,000
GBP
|
–
GBP
|
12,700,000
GBP
|
700,000
GBP
|
–
GBP
|
200,000
GBP
|
–
GBP
|
22,000,000
GBP
|
186,500,000
GBP
|
–
GBP
|
165,400,000
GBP
|
186,500,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — |
87,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
186,500,000
GBP
|
— | — | — |