Police are appealing to members of the public after an indecent exposure took place in Hatfield.
The incident occurred on Sunday 23rd September, between the times of 5pm and 5.15pm on the 301 Arriva single decker bus.
The offender moved seats next to a woman, with the aisle separating them.
The offender then proceeded to expose himself to the victim.
The offender is described as a white man in his 30s, with dark hair, thin build wearing a beige coat with toggles.
The coat had a hood which was up at the time of the offence.