Statement Of Financial Position [Abstract]
| Concept |
As at 2024-09-30 |
As at 2024-09-30 |
As at 2024-09-30 |
As at 2024-09-30 |
As at 2024-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||
| Assets [abstract] | |||||||||||||||
| Property, plant and equipment |
108,000,000
GBP
|
— | — | — | — |
104,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Goodwill |
2,130,000,000
GBP
|
— | — | — | — |
2,245,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Current tax assets |
16,000,000
GBP
|
— | — | — | — |
42,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Deferred tax assets |
81,000,000
GBP
|
— | — | — | — |
56,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
508,000,000
GBP
|
— | — | — | — |
696,000,000
GBP
|
— | — | — | — |
489,000,000
GBP
|
— | — | — | — |
| Assets |
3,638,000,000
GBP
|
— | — | — | — |
3,936,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital |
11,000,000
GBP
|
— | — | — | — |
12,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Retained earnings |
446,000,000
GBP
|
— | — | — | — |
658,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Share premium |
548,000,000
GBP
|
— | — | — | — |
548,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Other reserves |
88,000,000
GBP
|
— | — | — | — |
189,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Equity |
1,093,000,000
GBP
|
11,000,000
GBP
|
548,000,000
GBP
|
446,000,000
GBP
|
88,000,000
GBP
|
1,407,000,000
GBP
|
658,000,000
GBP
|
548,000,000
GBP
|
12,000,000
GBP
|
189,000,000
GBP
|
1,397,000,000
GBP
|
12,000,000
GBP
|
570,000,000
GBP
|
267,000,000
GBP
|
548,000,000
GBP
|
| Liabilities [abstract] | |||||||||||||||
| Current tax liabilities |
26,000,000
GBP
|
— | — | — | — |
25,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
18,000,000
GBP
|
— | — | — | — |
18,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Liabilities |
2,545,000,000
GBP
|
— | — | — | — |
2,529,000,000
GBP
|
— | — | — | — | — | — | — | — | — |