Same man has struck three times
Detectives have released CCTV images of a man they would like to speak to in connection with three armed robberies.
In each case the suspect has entered a bookmakers and forced workers to hand over cash after threatening them with a gun.
He first struck at William Hill in Station Road, Harrow, on June 13, before targeting Ladbrokes in Station Parade, Kenton Lane, Kenton, 15 days later.
In the third robbery he held up Ladbrokes in Sudbury Heights Avenue, Greenford.
The robber is black, in his 20s and 5ft 10ins tall.
Any witnesses or anyone who knows who the suspect is asked to call the incident room on 020 8358 1751 or Crimestoppers anonymously on 0800 555 111.
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