British Transport Police would like to speak to this man after a 15-year-old girl was flashed at by a pervert fellow passenger.

Officers say the passenger “touched himself inappropriately whilst looking at” the victim, who was travelling on a Metropolitan Line train between Moor Park and Pinner underground stations at around 3.30pm on Friday, August 14.

The victim fled the train at Pinner and reported the incident to the police.

PC Tom Whitton said: “This was a very distressing and intimidating experience for the victim, who at just 15 years old was put in a frightening situation.

“Behaviour such as this is completely unacceptable and anyone who recognises the man pictured in the CCTV images is asked to contact police.”

Anyone with any information is asked to call 0800 40 50 40 or Crimestoppers on 0800 555 111.