A shop worker confronted a knife-wielding robber who appeared to threaten a female colleague at a newsagents in Lincolnshire on 29 March.
Police have released footage of the incident that occurred shortly after 5:30am at Gedney Newsagent, Market Place, Long Sutton, with the hope that someone recognises the man involved.
Officers believe the man has a unique gait and that someone could recognise the clothing he is wearing — a black face covering, black jacket with the hood up, and two-tone grey trousers.
The man was handed cash and cigarettes before fleeing in the direction of West Street.
Police have asked anyone who thinks they know the man to contact [email protected] quoting Incident 71 of 29 March or call 101.
Alternatively they can contact Crimestoppers anonymously and free on 0800 555111 or online at Crimestoppers-uk.org.