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ACCOUNTING POLICIES (Details)
12 Months Ended
Dec. 31, 2021
Freehold/long and short leasehold premises | Top of range  
ACCOUNTING POLICIES [Line Items]  
Useful life measured as period of time, property, plant and equipment 50 years
Leasehold improvements | Top of range  
ACCOUNTING POLICIES [Line Items]  
Useful life measured as period of time, property, plant and equipment 10 years
Capitalised software enhancements | Top of range  
ACCOUNTING POLICIES [Line Items]  
Useful life measured as period of time, property, plant and equipment 7 years
Brands | Bottom of range  
ACCOUNTING POLICIES [Line Items]  
Useful life measured as period of time, property, plant and equipment 10 years
Brands | Top of range  
ACCOUNTING POLICIES [Line Items]  
Useful life measured as period of time, property, plant and equipment 15 years
Fixtures and furnishings | Bottom of range  
ACCOUNTING POLICIES [Line Items]  
Useful life measured as period of time, property, plant and equipment 10 years
Fixtures and furnishings | Top of range  
ACCOUNTING POLICIES [Line Items]  
Useful life measured as period of time, property, plant and equipment 20 years
Equipment and motor vehicles | Bottom of range  
ACCOUNTING POLICIES [Line Items]  
Useful life measured as period of time, property, plant and equipment 2 years
Equipment and motor vehicles | Top of range  
ACCOUNTING POLICIES [Line Items]  
Useful life measured as period of time, property, plant and equipment 8 years