This is the terrifying moment a man armed with a large knife threatened a shop worker and made off with cash from a convenience store in Plymouth.The robbery happened at LM Stores in North Road West at about 9.45pm last night.CCTV footage from the store shows the robber, wearing all black, threaten the shop worker with what appears to be a large kitchen knife.He fled the scene with about £140 in cash.Elena Anderson's daughter's fiancé was working at the store at the time of the...
