On Tuesday, July 12th, at approximately 7.30pm, the victim noticed a man filming her from unusual angles before noticing photos of her upper leg on his phone screen.
The service was near King’s Cross Underground station at the time of the incident.
At 7.30 p.m., the man exited the eastbound train at Arsenal Underground station.
Please contact BTP by texting 61016 or calling 0800 40 50 40 and quoting reference 2200069578 if you recognise him or have any information.
You can also call Crimestoppers anonymously at 0800 555 111.