A passenger indecently exposed himself to a 16-year-old boy on a train in Surrey.
After the teenager got on the train at Guildford a man sitting nearby began to behave inappropriately. Police now want to find this passenger seen on CCTV.
The train was traveling from Guildford to Aldershot on Tuesday, 20 May at around 11pm.
Anyone with information can contact British Transport Police on 0800 40 50 40, or text 61016, quoting reference SSUB/B8 of 30/06/2014, or Crimestoppers on 0800 555 111.