Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-09-30 |
As at 2023-09-30 |
As at 2022-09-30 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
71,000,000
GBP
|
74,700,000
GBP
|
71,400,000
GBP
|
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
171,500,000
GBP
|
168,200,000
GBP
|
170,200,000
GBP
|
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash |
2,525,400,000
GBP
|
2,994,300,000
GBP
|
— |
| Cash and cash equivalents |
2,525,000,000
GBP
|
2,994,100,000
GBP
|
1,930,500,000
GBP
|
| Miscellaneous assets [abstract] | |||
| Net defined benefit asset |
22,200,000
GBP
|
12,700,000
GBP
|
7,100,000
GBP
|
| Derivative financial assets |
391,800,000
GBP
|
615,400,000
GBP
|
779,000,000
GBP
|
| Investments other than investments accounted for using equity method |
427,400,000
GBP
|
-
GBP
|
-
GBP
|
| Loans and advances | — | — | — |
| Loans and advances to banks |
209,900,000
GBP
|
211,000,000
GBP
|
318,400,000
GBP
|
| Loans and advances to customers |
15,630,300,000
GBP
|
14,495,000,000
GBP
|
13,650,400,000
GBP
|
| Cash and bank balances at central banks |
2,315,500,000
GBP
|
2,783,300,000
GBP
|
1,612,500,000
GBP
|
| Other assets |
20,700,000
GBP
|
51,000,000
GBP
|
39,200,000
GBP
|
| Borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
400,000
GBP
|
200,000
GBP
|
400,000
GBP
|
| Borrowings, by type [abstract] | |||
| Loans received | — | — | — |
| Secured bank loans received |
-
GBP
|
-
GBP
|
586,000,000
GBP
|
| Miscellaneous liabilities [abstract] | |||
| Derivative financial liabilities |
99,700,000
GBP
|
39,900,000
GBP
|
102,100,000
GBP
|
| Deposit liabilities | — | — | — |
| Deposits from customers [abstract] | |||
| Deposits from customers |
16,314,700,000
GBP
|
13,234,400,000
GBP
|
10,569,500,000
GBP
|
| Other liabilities |
417,400,000
GBP
|
631,200,000
GBP
|
513,100,000
GBP
|
| Issued capital [abstract] | |||
| Issued capital |
210,600,000
GBP
|
228,700,000
GBP
|
241,400,000
GBP
|
| Net assets (liabilities) [abstract] | |||
| Assets |
19,270,000,000
GBP
|
18,420,200,000
GBP
|
16,653,600,000
GBP
|
| Liabilities |
17,850,500,000
GBP
|
17,009,600,000
GBP
|
15,236,300,000
GBP
|
| Assets less current liabilities [abstract] |