Officers are appealing for the public’s help to trace this man.
He is suspected of exposing himself on the X12 bus which was travelling from Lichfield to Burton-upon-Trent at around 8.35am on Thursday 2 July.
The suspect, who is believed to be aged in his 50s, left the bus in the Burton area.
If you think you know who he is please contact PC Bryn Jeavons at Staffordshire Police on 101, quoting incident number 447 of July 4. Alternatively, you can contact the independent crime-fighting charity Crimestoppers anonymously on 0800 555 111 or through their Anonymous Online Form at www.crimestoppers-uk.org. No personal details are taken, information cannot be traced or recorded and you will not go to court.