Nigel Farage slammed Sir Bob Geldof over the insults which were traded across flotillas on the river Thames yesterday, firmly pinning the blame on The Boomtown Rats rocker.
The incident took place as the UKIP leader was at the head of a fleet of fishing boats up the river to urge Parliament take back control of British waters when they were meet by a rival Remain fleet led by Geldof.
Mr Farage accused Mr Geldof of "mocking" impoverished fishermen.
"I was trying to give voice to an industry which has all but been destroyed by EU membership," he told Paul Ross. "We've given away our territorial waters, and the fish which swim within them, to be shared with the rest the European Union.
"I was trying to give the men and women who work in the industry a voice, and the in crowd, upper-middle class New Labour types, with chief luvvie Sir Bob, or Sir 'Yob' Geldof hurling abuse at people trying to earn a living, was an unseemly spectacle."
Farage insisted Bob Geldof's actions will have an impact ahead of next week's referendum.
"I think the image of Geldof making an obscene gesture at some fishermen shouting at him could be the enduring image of the campaign. The wealthy establishment who want to stay in the EU because they like to have have cheap chauffeurs, cheap nannies, against the working class.
"I think yesterday in many ways defined the battle lines of this referendum."