Officers investigating an indecent exposure offence at Chesterfield station are today releasing this CCTV image in connection.
At around 8.30pm on Sunday 13 March, a man approached a woman with a child near the ticket machine and engaged her in a conversation.
The woman and her child then walk to platform 1 of the station and the man followed them. He attempted to use the vending machine nearby, then turned towards them and exposed himself.
He then walked back towards the ticket office at the entrance of the station.
Officers believe the man in the CCTV image may have information which could help their investigation.
If you recognise him, or have any information, please contact British Transport Police by texting 61016 or calling 0800 40 50 40 quoting reference 658 of 13/3/22.
Alternatively, you can call Crimestoppers anonymously on 0800 555 111.