Five men were jailed for a total of at least 70 years yesterday after they were convicted of kidnapping and robbery in Britain's biggest ever heist, a £53 million raid on a cash depot in Kent in February 2006.

The robbers, some dressed as policemen and most wearing prosthetic disguises, snatched the record haul after getting past tight security by kidnapping the depot's manager, his wife and son at gunpoint in a crime described by the judge as "organised banditry". They were also helped by an "inside man", who not only provided details of the building's interior layout and security protocols, but also secretly filmed it using a tiny camera hidden on his belt.

Four members of the gang, Stuart Royle, 49, Jetmir Bucpapa, 26, Lea Rusha, 35, and Roger Coutts, 30, were each sentenced to a minimum of 15 years' jail. A fifth man, Ermir Hysenaj, 28, will serve a minimum of 10 years.