A 19-year-old faces prison after being found guilty of killing a father by dangerous driving in Hanwell.
A jury convicted Martin McDonagh at IsleworthCrown Court this week of running over 48-year-old Les Mortimer.
Mr Mortimer was fatally injured after being struck by a Ford Mondeo driven by McDonagh outside The White Hart pub in Greenford Avenue.
The victim - more commonly known as Les Wilkinson - had been entangled in a fracas between locals and travellers using the venue on July 13 last year.
Trouble erupted when pub regular Paul Killeen, 39, and Mortimer became angry that a group of travellers, including McDonagh, from Ruislip, and his cousin Patrick McDonagh, also 19, were drinking in the pub.
Prosecutor Michael Mulkerrins said: "There was a background of bad feeling between the two groups and Killeen earlier told the police the McDonaghs had threatened to kill him."
Just before 11pm, the McDonaghs' group moved into the sports bar to play pool.
"They were minding their own business," said Mr Mulkerrins. "The others entered the bar and there was a confrontation. There was a lot of finger-pointing and chest-puffing in the bar. Both groups went outside and things kicked off very quickly."
The court heard Patrick McDonagh drove a Vauxhall Vectra at a group of men including Killeen, of Greenford Avenue, who used a claw hammer to smash the car's windscreen.
Mr Mulkerrin said that seconds later, Martin McDonagh got into the black Ford Mondeo and sped away, driving towards the junction of Greenford Avenue and Beresford Road.
He was then reported to have hit a Ford Fiesta owned by Mr Mortimer's girlfriend, causing Mr Mortimer to fall into the road. As he lay in the road he was run over and later died of multiple injuries, including a broken back, at Ealing Hospital.
It is alleged that McDonagh then drove off with police following the Mondeo as it turned into Perivale Lane, a dead end, then drove at speed along the pavement of the A40 before smashing into a bus stop. Martin McDonagh is then alleged to have run off.
Patrick McDonagh, of Kingston Road, Southall, was arrested at home a week later and his cousin a week after that.
Both men denied all charges and claimed, through their counsel, to have been acting in self-defence and to have been the victims rather than aggressors. Neither went to the witness box in their own defence.
Killeen, of Greenford Avenue, earlier admitted having a hammer as an offensive weapon in a public place but faces a possible re-trial on a charge of affray and threatening violence after the jury could not agree on a verdict.
Martin McDonagh was also found guilty of driving dangerously onto the A40 Western Avenue and Patrick McDonagh was found guilty of driving a Vauxhall Vectra dangerously in Greenford Avenue, Hanwell.
The pair were remanded on bail for pre-sentence reports and will appear at Iselworth Crown Court for sentencing in January. They were warned to expect custodial sentences.