detectives investigating the hatton garden gem heist missed the most crucial cctv footage so far until it was flagged up by a shocked worker more than one week later , it is claimed .
the ` crystal clear ' footage - said to be of a significantly higher quality than the video currently in the public domain - was handed into the metropolitan police by a worker based 50ft from the crime scene .
the worker had reportedly contacted 101 - the police non-emergency number - on monday last week , believing detectives would already have similar images of the £ 60m raid .