Detectives have released an image of a man they want to trace after a woman was upskirted on an escalator at West Ham Underground station last month.
British Transport Police (BTP) say that at around 8.27am on Friday 24 July, a member of the public noticed a man holding a mobile phone in an upward-facing position towards a woman on an escalator.
The man then boarded a Jubilee line train towards Stratford.
Officers say the man in the image may have information that could assist their enquiries. He has not been described as a suspect, and no arrests have been announced.
The appeal was issued this month, more than three weeks after the incident.
Anyone who recognises the man in the image is asked to text BTP on 61016 or call 0800 40 50 40, quoting reference 137 of 24 July.
Information can also be given anonymously to Crimestoppers on 0800 555 111.
Upskirting became a criminal offence in England and Wales under the Voyeurism (Offences) Act 2019, and carries a maximum sentence of two years' imprisonment.
A University College London study published in July analysed 246 upskirting offences recorded by BTP across the Transport for London (TfL) rail and tram network between April 2019 and March 2024.
Victims were overwhelmingly female (99 per cent), and most commonly aged between 20 and 29.
Most offences — 58 per cent — happened on trains, but when they occurred inside stations, nearly a third were on stairs and escalators.
Incidents on stairs and escalators were more likely than average to end in a charge or court summons, but investigations into incidents on moving trains often ended with no suspect being identified.
Just 11 per cent of the recorded upskirting cases in the study resulted in a charge or court summons. More than half — 53 per cent — were closed without a suspect being identified.
