Appeal for two teenage witnesses

The girls were part of a group of five people including two other girls and a boy.

They were travelling on a Southern train between Chichester and Worthing on Sunday, January 13 at around 5.20pm when the incident happened.

The girls, described as blonde and around 14 years of age had photographs taken of them by a man who also tried to speak to them, before they got off at Barnham railway station.

Officers are asking for the girls, or anyone who was part of the group to contact Detective Constable Helen Curtis at Worthing CID on 0845 60 70 999 extension 81272.