Officers have been investigating reports of an attempted rape which took place inside a social and health club on Commercial Road, Limehouse, on Monday last week (February 17).
The incident is said to have taken place between 5pm and 6pm.
It is alleged that a man tried to rape the victim, a man in his 20s, and the suspect is described as a man in his mid to late 30s.
The Metropolitan Police has released an appeal to identify the man pictured as part of their enquiries.
Detective Sergeant Stacey Smith, from the Central East Public Protection Team, said: “This was a terrifying experience for the victim, who continues to be supported by specialist officers.
“We are seeking the help of the public to identify the man in this image. Do you recognise him? Did you see him in the area that night? If you believe you know who he is don’t approach him directly, contact police.”
Anyone with information is asked to call 101 quoting CAD 3226/25Feb, alternatively contact Crimestoppers on 0800 555 111.