Police have appealed for witness following an attempted sexual assault on board a train in south London.

The incident occurred at around 10pm on Tuesday July 28 on a train between City Thameslink and London Bridge.

A man on a mobility scooter attempted to sexually assault a woman, before two witnesses challenged the man and alerted the victim.

British Transport Police (BTP) officers have now identified the attacker, and have appealed for the two witnesses or anyone else who may have seen what happened to come forward and assist their investigation.

The BTP have described the man as white, in his late 50s, and was wearing a black hat and jacket.

Police have urged witnesses to text BTP on 61016, or call 0800 40 50 40, using the reference 776 of 28 July. Information can also be given anonymously to Crimestoppers on 0800 555 111.