Statement Of Cash Flows [Abstract]
| Concept |
2022-08-01 to 2023-07-31 |
As at 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 |
As at 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 |
As at 2021-07-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||
| Profit (loss) |
365,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
365,000,000
GBP
|
–
GBP
|
–
GBP
|
242,600,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
242,600,000
GBP
|
— |
| Adjustments to reconcile profit (loss) [abstract] | |||||||||||||||
| Adjustments for income tax expense |
118,000,000
GBP
|
— | — | — | — | — | — |
61,600,000
GBP
|
— | — | — | — | — | — | — |
| Adjustments for finance costs |
30,800,000
GBP
|
— | — | — | — | — | — |
15,700,000
GBP
|
— | — | — | — | — | — | — |
| Adjustments for decrease (increase) in inventories |
152,000,000
GBP
|
— | — | — | — | — | — |
391,400,000
GBP
|
— | — | — | — | — | — | — |
| Adjustments for provisions |
55,700,000
GBP
|
— | — | — | — | — | — |
325,500,000
GBP
|
— | — | — | — | — | — | — |
| Adjustments for share-based payments |
4,500,000
GBP
|
— | — | — | — | — | — |
3,100,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) operations |
372,900,000
GBP
|
— | — | — | — | — | — |
114,600,000
GBP
|
— | — | — | — | — | — | — |
| Interest paid, classified as operating activities |
6,900,000
GBP
|
— | — | — | — | — | — |
5,800,000
GBP
|
— | — | — | — | — | — | — |
| Income taxes paid (refund), classified as operating activities |
129,800,000
GBP
|
— | — | — | — | — | — |
63,800,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) operating activities |
236,200,000
GBP
|
— | — | — | — | — | — |
45,000,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||
| Proceeds from sales of property, plant and equipment, classified as investing activities |
100,000
GBP
|
— | — | — | — | — | — |
100,000
GBP
|
— | — | — | — | — | — | — |
| Purchase of property, plant and equipment, classified as investing activities |
2,700,000
GBP
|
— | — | — | — | — | — |
500,000
GBP
|
— | — | — | — | — | — | — |
| Interest received, classified as investing activities |
6,900,000
GBP
|
— | — | — | — | — | — |
500,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) investing activities |
8,300,000
GBP
|
— | — | — | — | — | — |
35,300,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||
| Proceeds from issuing shares |
–
GBP
|
— | — | — | — | — | — |
2,200,000
GBP
|
— | — | — | — | — | — | — |
| Payments to acquire or redeem entity's shares |
–
GBP
|
— | — | — | — | — | — |
7,400,000
GBP
|
— | — | — | — | — | — | — |
| Payments of lease liabilities, classified as financing activities |
3,500,000
GBP
|
— | — | — | — | — | — |
2,900,000
GBP
|
— | — | — | — | — | — | — |
| Dividends paid, classified as financing activities |
171,700,000
GBP
|
— | — | — | — | — | — |
157,200,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) financing activities |
241,200,000
GBP
|
— | — | — | — | — | — |
165,300,000
GBP
|
— | — | — | — | — | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes |
13,300,000
GBP
|
— | — | — | — | — | — |
85,000,000
GBP
|
— | — | — | — | — | — | — |
| Cash and cash equivalents | — |
362,000,000
GBP
|
— | — | — | — | — | — |
375,300,000
GBP
|
— | — | — | — | — |
460,300,000
GBP
|