Lloyds Banking Group has been fined £4.3 million by the City watchdog for failings that resulted in up to 140,000 customers receiving delayed payment protection insurance redress.
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It is unclear what their alleged plans were.
Anti-terror police are currently questioning the men who were arrested at three separate locations in France.
A weather warning is also in place for Scotland, which could see "treacherous" and blizzard-like conditions on Thursday.