Trailer: The hunt for the Brink's-Mat gold

In 1983, an armed gang stole £26m in gold bars from a high-security depot near London’s Heathrow Airport. Dubbed the crime of the century by the press, the heist changed the face Britain’s criminal landscape and the life of one undercover Scotland Yard detective. Ian Brown tells what happened when he was sent out to recover the gold. Narrated by Sky News crime correspondent Martin Brunt.