The British Transport Police has released a picture of man they want to speak to in connection with the incident on a train near Leicester
The incident happened shortly before the train arrived at Leicester station
“If he looks familiar or you have any information which could help the investigation, please call 0800 40 50 40 or text 61016, quoting 217 of 4 September. Alternatively, you can ring Crimestoppers anonymously on 0800 555 111.”