Police are hunting a bus pervert, who exposed and played with himself while sitting next to a female passenger on a busy service travelling through central London.
The suspect was travelling on a 68 bus and performed the sex act as it travelled through Russell Square, Bloomsbury at 9.45pm on August 15, last year.
He shielded himself from other passengers as he exposed himself to the 37 year-old woman.
The suspect is described as a dark skinned Afro-Caribbean man, aged between 20 and 30 years-old with an athletic build.
He was wearing a black and white baseball cap, a short sleeved grey shirt with grey tracksuit trousers.
Officers have released this CCTV image and ask anyone with information to contact PC Neil Webb who is leading the investigation on 020 3054 6712 or via 101.
Alternatively, they can call Crimestoppers anonymously on 0800 555 111, quoting reference 224997.