The incident, which took place on Rushey Green in Catford on Saturday, August 1, led to a foot chase involving a man in his 40s who discarded a knife before being detained. The robbery took place on Rushey Green (Image: Google Maps)READ MORE:A Met spokesperson said: "The man and a woman, also in her 40s, were arrested on suspicion of robbery, possession of an offensive weapon and possession of drugs."