article_snippet.sent: The gang is thought to have hidden in an office before abseiling down a lift shaft and drilling into a vault .
article_snippet.sent: The CCTV reveals how the raiders entered the building by a side door on Thursday evening, minutes after staff left the premises.
article_snippet.sent: how the raiders entered the building by a side door on Thursday evening, minutes after staff left the premises then entered the basement through the lift shaft, and broke through the shutters before spending hours in the vault - emerging the next morning carrying the gems out the building in a wheelie bin.
article_snippet.sent: how the raiders entered the building by a side door on Thursday evening, minutes after staff left the premises then returned on Saturday night, apparently repeating the process throughout the night, leaving early on the morning of Easter Sunday.