The Government has defeated a Labour motion to postpone the 3p fuel duty rise in January by 234 votes to 282 - a majority of 48.
But it means Labour can now go on the airwaves saying the Tories and Lib Dems voted against freezing petrol prices in 2013 (until the mini-budget on December 5)
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The Ukip leader confirmed he had "no prior warning" of Douglas Carswell's resignation from the party as he hit out at the "staunch Tory".
Two knives were found at the scene in Islington, North London, and the suspects fled on foot before being arrested.
The violence began after a counter-protester allegedly doused a female rally organiser with pepper spray.