A woman was sexually assaulted on a number 55 bus sparking a police appeal for help to find her attacker.

On March 23, at about 9.50pm a 31-year-old woman was sexually assaulted by a man as she travelled.

The number 55 starts in Bakers Arms, Leyton and ends at Oxford Circus, but the assault took place close to Shoreditch Town Hall.

Police have not said where either passenger got on the bus.

Officers from the Metropolitan Police Service's Roads and Transport Policing Command are appealing for help in identifying a man.

The suspect is described as a white man, aged about 20 to 25 years of age, slim build, with dark hair, wearing a grey suit.

Anyone with information is asked to contact Detective Constable Joanne O'Connor, who is leading the investigation on 07795 266293 or Crimestoppers anonymously quoting reference 175616.