In a plot three years in the planning, the gang broke into the vault of the Hatton Garden Safety Deposit building during the long Easter holiday weekend last year.
They entered an elevator shaft and climbed down to the vault where they used heavy equipment to drill through a thick concrete wall. Initially thwarted, they returned the following day and ransacked 73 deposit boxes, stealing jewels, gold and cash worth £14 million.
Only about a third of that has been recovered, including some which was hidden under headstones in a London graveyard.
