row started after a group of far-right supporters calling themselves the east kent english patriots supported mr farage at an event in broadstairs on friday evening .
they were led by gary field , a former regional organiser for the english defence league , and enjoyed the protection of ukip 's security teams .
mr field , who has a criminal record for assault , drank beers behind the cordon with fellow members of his group and gestured to onlookers as a crowd waited for mr farage 's arrival .