Video of the last robbery, which was at a Bromley Co-Op shop on the evening of February 13 2016, shows one of the men pointing a sawn-off shot gun in the face of a young member of staff.

The two robbers threaten two young cashiers with the gun before taking £200 in cash from the till.

Both men pleaded guilty to three counts of armed robbery at Croydon Crown Court on Friday and will be sentenced in August.