The Ukip MP backs a funding boost for the health service, but that's not his party's line.
Tory turncoat Douglas Carswell has opted to sit in the Commons chamber on the front bench below the gangway populated by the socialist heckler tendency.
Giles Watling, former 80s TV star, is selected through an open primary to fight the by-election against Douglas Carswell.
Speculation about a split on the right is nothing new – as far back as 1846, when Robert Peel repealed the Corn Laws, the “battle for the soul” of the Conservative Party was underway.
What impact will the Clacton by-election and Douglas Carswell's defection have on the UK Independence Party?
If Carswell wins his by-election, and the potential momentum that could give Ukip, an EU referendum will look more likely – and the renegotiation would suddenly look very different.
Ukip's Clacton candidate, who is refusing to give way to Douglas Carswell, is now considering defecting himself - to the Conservative party.
Following the surprise news this week that Douglas Carswell MP has defected from the Conservatives to Ukip, Nigel Farage is anticipating more Tories joining his fold.
Watch the PM clash back in 2012 with the backbench MP who has today defected from his party to Ukip.
The MP for Clacton has defected from the Conservatives to Ukip.