Statement Of Cash Flows [Abstract]
| Concept |
2021-11-01 to 2022-10-31 |
2021-11-01 to 2022-10-31 |
As at 2022-10-31 |
2021-11-01 to 2022-10-31 |
2021-11-01 to 2022-10-31 |
2021-11-01 to 2022-10-31 |
2020-11-01 to 2021-10-31 |
2020-11-01 to 2021-10-31 |
As at 2021-10-31 |
2020-11-01 to 2021-10-31 |
2020-11-01 to 2021-10-31 |
2020-11-01 to 2021-10-31 |
As at 2020-10-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||
| Profit (loss) |
—
GBP
|
462,900,000
GBP
|
— |
—
GBP
|
462,900,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
382,000,000
GBP
|
382,000,000
GBP
|
— |
| Cash flows from (used in) operations | — |
132,200,000
GBP
|
— | — | — | — | — | — | — | — |
115,600,000
GBP
|
— | — |
| Interest paid, classified as operating activities | — |
16,900,000
GBP
|
— | — | — | — | — | — | — | — |
14,100,000
GBP
|
— | — |
| Interest received, classified as operating activities | — |
100,000
GBP
|
— | — | — | — | — | — | — | — |
900,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities | — |
5,600,000
GBP
|
— | — | — | — | — | — | — | — |
5,400,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — |
109,800,000
GBP
|
— | — | — | — | — | — | — | — |
97,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
111,500,000
GBP
|
— | — | — | — | — | — | — | — |
—
GBP
|
— | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
200,000
GBP
|
— | — | — | — | — | — | — | — |
—
GBP
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities | — |
200,900,000
GBP
|
— | — | — | — | — | — | — | — |
66,200,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||
| Proceeds from issuing shares | — |
500,000
GBP
|
— | — | — | — | — | — | — | — |
700,000
GBP
|
— | — |
| Proceeds from borrowings, classified as financing activities | — |
266,100,000
GBP
|
— | — | — | — | — | — | — | — |
196,800,000
GBP
|
— | — |
| Repayments of borrowings, classified as financing activities | — |
134,000,000
GBP
|
— | — | — | — | — | — | — | — |
153,000,000
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities | — |
8,400,000
GBP
|
— | — | — | — | — | — | — | — |
7,500,000
GBP
|
— | — |
| Dividends paid, classified as financing activities | — |
56,900,000
GBP
|
— | — | — | — | — | — | — | — |
42,600,000
GBP
|
— | — |
| Cash flows from (used in) financing activities | — |
69,000,000
GBP
|
— | — | — | — | — | — | — | — |
6,300,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
22,100,000
GBP
|
— | — | — | — | — | — | — | — |
24,500,000
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — |
200,000
GBP
|
— | — | — | — | — | — | — | — |
900,000
GBP
|
— | — |
| Cash and cash equivalents | — | — |
20,900,000
GBP
|
— | — | — | — | — |
43,200,000
GBP
|
— | — | — |
19,600,000
GBP
|