FINANCE LEASE RECEIVABLES (Details) - Schedule of Lease Receivable Net Investment - GBP (£) £ in Millions	Dec. 31, 2018	Dec. 31, 2017
FINANCE LEASE RECEIVABLES (Details) - Schedule of Lease Receivable Net Investment [Line Items]
Net investment in finance leases	£ 1,822	£ 2,094
Not later than one year [member]
FINANCE LEASE RECEIVABLES (Details) - Schedule of Lease Receivable Net Investment [Line Items]
Net investment in finance leases	152	546
Later than one year and not later than five years [member]
FINANCE LEASE RECEIVABLES (Details) - Schedule of Lease Receivable Net Investment [Line Items]
Net investment in finance leases	679	887
Later than five years [member]
FINANCE LEASE RECEIVABLES (Details) - Schedule of Lease Receivable Net Investment [Line Items]
Net investment in finance leases	£ 991	£ 661

The gross investment in the finance lease discounted at the interest rate implicit in the lease. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset. Gross investment in the finance lease is the sum of: (a) the lease payments receivable by a lessor under a finance lease; and (b) any unguaranteed residual value accruing to the lessor. Interest rate implicit in the lease is the rate of interest that causes the present value of (a) the lease payments and (b) the unguaranteed residual value to equal to the sum of (i) the fair value of the underlying asset and (ii) the initial direct costs of the lessor.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2019-01-01
-Name IFRS
-Number 16
-IssueDate 2018-01-01
-Paragraph 94
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_94&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_NetInvestmentInFinanceLease
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant