Joining Ms Sinclaire at the party's inaugural conference on Friday are Katie Hopkins, a former contestant on the BBC's Apprentice show, and the right-wing broadcaster Charlie Woolf.
One MEP who lost the party whip in March after refusing to sit in its parliamentary group, Nikki Sinclaire, has driven to Torquay to park a brightly coloured signwritten van conspicuously lacking UKIP's branding, outside the conference centre.