Detectives from the Flying Squad are investigating nine armed robberies in the Plaistow, Stepney and Whitechapel areas, which they believe are linked.
In each robbery a man entered a bookmakers and demanded cash, threatening staff with a suspected firearm.
Almost £1,600 has been stolen in total in these incidents.
Detectives would like to speak to the man shown in the CCTV images in connection with the robberies. He is described as Asian, aged in his 30s, and of medium build.
Detective Constable Tom Boow, the investigating officer from the Met’s Flying Squad, said: “We are extremely keen to speak to the man in the CCTV images in connection with these nine robberies.
“Someone must recognise the man and we would urge anyone who does know him to contact the police or Crimestoppers as soon as possible.
“These robberies have been terrifying for the victims, and it is very fortunate that no one has been physically injured.”
Anyone with information can call police on 101.
Information can also be reported anonymously on 0800 555 111 or online at www.crimestoppers-uk.org
Source: Met Police