At just before 8pm on 30 July, a member of rail staff who was working on the service was sexually assaulted by a woman.
She then got off the train at East Croydon station.
If you recognise her, or have any information, please contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 482 of 28/09/2022.
Alternatively, you can call Crimestoppers anonymously on 0800 555 111.
