£40m depot raid
From the Guardian:
An armed gang escaped with up to £40m million in a raid on a high-security cash storage depot yesterday in what is thought to be one of the biggest robberies in history.Apparently the fake police officers were very convincing - one group said they were looking for a old lady who had said "Fiddlesticks!" in a built up area, and the other claimed they were on their way to stop a game of kiss-chase at a nearby infant school.
During a meticulously-planned operation, the depot's manager and his family were abducted by two groups of men posing as police officers, while other gang members tied up all 15 members of staff.