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GOODWILL (Tables)
12 Months Ended
Dec. 31, 2017
Disclosure of goodwill [text block] [Abstract]  
Disclosure of reconciliation of changes in goodwill [text block]
   2017   2016 
   £m   £m 
At 1 January   2,016    2,016 
Acquisition of businesses (note 22)   302    – 
Impairment charged to the income statement (note 11)   (8)   – 
At 31 December   2,310    2,016 
Cost1   2,664    2,362 
Accumulated impairment losses   (354)   (346)
At 31 December   2,310    2,016 
1 For acquisitions made prior to 1 January 2004, the date of transition to IFRS, cost is included net of amounts amortised up to 31 December 2003.