Police are appealing for witnesses to an assault in which a 40-year-old man was attacked while on a number 29 to Tunbridge Wells.
Shortly afterwards the victim boarded the bus in Whitehall Road at 11.07am he was assaulted, but sustained no significant injuries.
A 38-year-old man from Lewes has been arrested on suspicion of assault by beating.
Anyone who saw what happened is asked to email firstname.lastname@example.org or phone 101, quoting serial 557 of 10/12.
Alternatively they can contact the independent charity Crimestoppers without having to leave their name on 0800 555 111.
After being questioned the man has been bailed until Wednesday 13th January 2016 whilst Police make further enquiries into the incident.