The victim was sat on the train when a man came and sat next to her. The man then inappropriately touched her then exposed himself. This was an extremely distressing experience for the victim, and we are determined to catch the man responsible. The man we would like to trace has been described as Asian, 5ft10, approximately 20 years of age and of a slim build. He was wearing a short sleeved red checked shirt and carrying a rucksack. We believe that the man may have then travelled onto Bradford.
More top news
Longest cold spell of winter so far. Bitterly cold with further wintry showers, significant snowfall likely over hills
Demonstrators will gather in Lincoln this morning to protest against proposed cuts to the city's local fire service.
Jon Mitchell with tonight's weather