Detectives are hunting for a man who flashed two women on a bus in Liverpool Street.
Police have released an image of someone they would like to identify and speak with following the incident.
Two women, aged in their 20s, reported they saw a man expose and touch himself indecently on a 149 bus travelling toward the busy station between 7.30am and 7.45am on November 5.
The male got off the bus at ‘Bus Stop D’ on Shoreditch High Street at the junction with Plough Yard.
It is thought that he works in the area.
Officers have released a CCTV image of the man in the hope that someone can name him.
Anyone who can name the male pictured should call 101 or Tweet @MetCC quoting 5033/5NOV.
To remain 100% anonymous contact the independent charity Crimestoppers on 0800 555 111 or visit crimestoppers-uk.org.