The Royal Bank of Scotland said it "regrets" its failure to correctly report transactions after being fined £5.6 million:
RBS fully cooperated with the regulator throughout the investigation. We regret the failings that were uncovered and have subsequently made significant investments to our systems and controls in this area.
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Among those expected to attend the ceremony will be former US President Bill Clinton and ex-Northern Ireland first minister Peter Robinson.
Five people have been killed and 40 injured after a car and knife attack in London on Wednesday.
A wet, wintry night in places with rain and hill snow slow to move away from southern Scotland and northern England.