Police have released this CCTV image as they hunt a violent thug, who punched a pedestrian to the ground in the early hours.
The victim, a man in his late twenties, suffered a broken nose and broken left arm after also being kicked as he lay defenceless on the pavement.
On Sunday February 21, police were called at around 1.30am to a report of an assault outside the Sudbury Hill Post Office on Greenford Road, Harrow.
The assault was reported to have occurred at some point between 1.10am and 1.30am that morning.
CCTV cameras captured the moment the suspect approached the victim, who was walking along the opposite side of the road.
The suspect crossed the street, approached the victim from behind, hit him over the back of the head and then kicked him in the head rendering him unconscious.
The victim was taken to a north London Hospital for treatment.
The suspect is described as a white man, aged in his early twenties, of large build, with short dark hair.
He was wearing a hooded jacket, light blue jeans and white trainers.
Police are keen to hear from anyone who may recognise the man shown in the footage, or who witnessed the assault.
Anyone with any information is asked to contact police via 101 quoting reference number 213052, or call Crimestoppers anonymously on 0800 555 111.