Statement Of Cash Flows [Abstract]
| Concept |
As at 2024-09-30 |
2023-10-01 to 2024-09-30 |
As at 2023-09-30 |
2022-10-01 to 2023-09-30 |
As at 2022-09-30 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Classes of cash payments from operating activities [abstract] | |||||
| Payments to and on behalf of employees | — |
–
GBP
|
— |
300,000
GBP
|
— |
| Cash flows from (used in) operations | — |
201,700,000
GBP
|
— |
229,200,000
GBP
|
— |
| Interest paid, classified as operating activities | — |
52,600,000
GBP
|
— |
46,900,000
GBP
|
— |
| Income taxes paid (refund), classified as operating activities | — |
12,500,000
GBP
|
— |
2,700,000
GBP
|
— |
| Cash flows from (used in) operating activities | — |
136,600,000
GBP
|
— |
184,700,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Other cash payments to acquire interests in joint ventures, classified as investing activities | — |
–
GBP
|
— |
34,000,000
GBP
|
— |
| Cash flows from (used in) investing activities | — |
167,700,000
GBP
|
— |
274,100,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments to acquire or redeem entity's shares | — |
100,000
GBP
|
— |
7,900,000
GBP
|
— |
| Proceeds from borrowings, classified as financing activities | — |
244,000,000
GBP
|
— |
330,000,000
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — |
185,000,000
GBP
|
— |
155,000,000
GBP
|
— |
| Dividends paid, classified as financing activities | — |
51,000,000
GBP
|
— |
45,700,000
GBP
|
— |
| Cash flows from (used in) financing activities | — |
3,300,000
GBP
|
— |
114,500,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
27,800,000
GBP
|
— |
25,100,000
GBP
|
— |
| Cash and cash equivalents |
93,200,000
GBP
|
— |
121,000,000
GBP
|
— |
95,900,000
GBP
|