Images captured on CCTV of the thieves entering and leaving the scene of the burglary have been issued in an attempt to jog people's memories.
We know that the thieves initially entered the building after 2100hrs on Thursday, 2 April and left shortly after 0800hrs on Friday, 3 April.
They returned to the scene soon after 2200hrs on Saturday, 4 April and were recorded on CCTV leaving the premises at around 0640hrs on Easter Sunday, 5 April.
On both days male (A) makes his way to the side exit of Hatton Garden Safety Deposit Ltd where he lets the other gang members into the building.
Fourteen CCTV images we are releasing today show six men entering and leaving Hatton Garden Safety Deposit Ltd.
Were you in the area of Hatton Garden?
Did you see anyone acting suspiciously around Hatton Garden Safety Deposit Ltd?
Did you see anyone in a vehicle loading or unloading heavy equipment nearby?
Anyone with information can contact the Incident Room on 020 8785 8655 or email us on OpSpire@met.police.uk. Anyone with information who would like to remain anonymous should call Crimestoppers on 0800 555 111.