This weekend marks ten years since Britain's biggest-ever cash heist took place in Kent.
Staggering in its size. Meticulous in its planning. But a decade on from the Tonbridge Securitas Robbery police have admitted most of the millions that were stolen will never be recovered.
More than £50 million was stolen by a gang who kidnapped the depot manager and his family at gunpoint. Although the robbers remain in jail £32 million has never been found.
We speak to: Howard Sounes, author of Heist: The True Story of the World's Biggest Cash Robbery. Also to Nick Kochan, author of The Washing Machine.