Six men involved in the £14 million Hatton Garden raid are due to be sentenced today.
The gang carried out the "sophisticated" and meticulously planned break-in over the Easter weekend last year.
They ransacked 73 boxes at Hatton Garden Safety Deposit after using a drill to bore a hole into the vault wall.
Valuables worth up to £14 million, including gold, diamonds and sapphires, were taken.
Two-thirds of them remain unrecovered.
Ringleaders John "Kenny" Collins, 75, of Bletsoe Walk, Islington; Daniel Jones, 61, of Park Avenue, Enfield; Terry Perkins, 67, of Heene Road, Enfield and the group's oldest member Brian Reader, 77, of Dartford Road, Dartford, pleaded guilty to conspiracy to commit burglary last September.
Carl Wood of Elderbeck Close, Cheshunt, Hertfordshire, and William Lincoln of Winkley Street, Bethnal Green, east London, were convicted of conspiracy to commit burglary and conspiracy to conceal, convert or transfer criminal property, after a trial at Woolwich Crown Court.
Plumber Hugh Doyle, of Riverside Gardens, Enfield, north London, was found guilty of concealing, converting or transferring criminal property between January 1 and May 19 last year.
The Crown Prosecution Service has urged the judge to cast aside sentencing guidelines, submitting that the statutory maximum of 10 years' imprisonment for conspiracy to burgle should be taken as the starting point.
Reader was also due to be sentenced. However, after falling ill in Belmarsh and having a second stroke he was deemed unfit to appear in the dock alongside his accomplices.
Another thief, known only as Basil, remains at large. He was instrumental in helping the gang get into the vault in the heart of London's diamond district.