Police are appealing for information after a man was strangled by a passenger in an unprovoked assault while the pair travelled on a bus in the Earls Court area.
Police says the assault was so fierce that the victim, a 37-year-old man on his way to work, passed out as he was being choked with the suspect's scarf.
It happened at around 13.50 hrs on Saturday 1 December on a bus travelling between Victoria and White City. Police say the attack lasted for around 30 seconds
Police are keen to speak with a black male, in his early to mid 20s. They say he was wearing a grey beanie hat, a sleeveless puffa-style jacket, a beige sweat shirt underneath, dark jeans and dark boots
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Peter Barnett made hundreds of trips from his home in Oxfordshire to Marylebone station without paying the full fare.
Police say he may have attacked more children and urged them to come forward.
The suspect walked up to a Tesco employee and shoulder barged him to the ground before punching him repeatedly in the face.