Disclosure Of Financial Instruments [Text Block]
| Concept |
As at 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
2022-02-01 to 2023-01-31 |
As at 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of financial instruments [text block] | — | — |
19 Financial assets and financial liabilities
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Description of accounting policy for financial instruments [text block] | — | — |
k. Financial instruments
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of financial assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of financial assets [abstract] | ||||||||||||||||
| Disclosure of financial assets [line items] | ||||||||||||||||
| Financial assets |
282,400,000
GBP
|
— | — | — | — | — | — | — |
332,100,000
GBP
|
— | — | — | — | — | — | — |
| Reconciliation of changes in allowance account for credit losses of financial assets [abstract] | ||||||||||||||||
| Changes in allowance account for credit losses of financial assets [abstract] | ||||||||||||||||
| Increase (decrease) in allowance account for credit losses of financial assets | — | — |
900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
700,000
GBP
|
— | — |
| Disclosure of financial liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of financial liabilities [abstract] | ||||||||||||||||
| Disclosure of financial liabilities [line items] | ||||||||||||||||
| Financial liabilities |
896,800,000
GBP
|
— | — | — | — | — | — | — |
936,200,000
GBP
|
— | — | — | — | — | — | — |
| Income, expense, gains or losses of financial instruments [abstract] | ||||||||||||||||
| Gains (losses) on financial instruments [abstract] | ||||||||||||||||
| Other comprehensive income, before tax, financial assets measured at fair value through other comprehensive income | — | — |
15,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
10,200,000
GBP
|
— | — |
| Gains (losses) on financial assets measured at fair value through other comprehensive income, before tax | — | — |
15,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
10,300,000
GBP
|
— | — |
| Reclassification adjustments on financial assets measured at fair value through other comprehensive income, before tax | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
100,000
GBP
|
— | — |
| Disclosure of general hedge accounting [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of detailed information about hedging instruments [text block] | — | — |
d) Cash flow hedges
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [abstract] | ||||||||||||||||
| Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] | ||||||||||||||||
| Reclassification adjustments on cash flow hedges, net of tax | — |
400,000
GBP
|
400,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
100,000
GBP
|
2,100,000
GBP
|
2,000,000
GBP
|
–
GBP
|
–
GBP
|
| Disclosure of credit risk [text block] | — | — |
b) Credit risk
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [abstract] | ||||||||||||||||
| Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] | ||||||||||||||||
| Disclosure of credit risk exposure [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of credit risk exposure [abstract] | ||||||||||||||||
| Disclosure of credit risk exposure [line items] | ||||||||||||||||
| Disclosure of provision matrix [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of provision matrix [abstract] | ||||||||||||||||
| Disclosure of provision matrix [line items] | ||||||||||||||||
| Disclosure of financial assets that are either past due or impaired [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of financial assets that are either past due or impaired [abstract] | ||||||||||||||||
| Disclosure of financial assets that are either past due or impaired [line items] | ||||||||||||||||
| Disclosure of financial instruments by type of interest rate [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of financial instruments by type of interest rate [abstract] | ||||||||||||||||
| Disclosure of financial instruments by type of interest rate [line items] |