Thieves stole $92 million in last week’s heist at Securitas Cash Management Ltd., a security warehouse in southeastern England, the biggest cash theft in British history, police said Monday.

The thieves, who dressed as police officers, stopped a Securitas manager, 51-year-old Colin Dixon, as he drove home from the cash depot near the Channel Tunnel, police said.A second group - also dressed as officers - went to Dixon’s home, telling his wife, Lynn, 45, he had been in an accident and taking her away with the couple’s 9-year-old son.