A man will be interviewed by police tomorrow about a sexual assault on a sleeping train passenger.

He contacted officers voluntarily following the release yesterday of a CCTV image of a man after the alleged attack on December 4.

A 21-year-old woman says she fell asleep on a train between Bromley South and Faversham and woke to find a man touching her between her legs.

The man got up and left the train either at Sittingbourne or Teynham station.

The assault happened between 11.40pm and 12.45am.

Anyone with information is asked to call BTP on 0800 405040, or text 61016, quoting reference S-SUB/B5 of 20/01/15.

Information can also be passed anonymously to Crimestoppers on 0800 555111.