Christina Odone is a well known Catholic Conservative (American born, she is the daughter/brother of the family that inspired ‘Lorenzo’s Oil). A lot of British Tories are quite hostile to Ukip because they know they have no chance of winning a general election, but are influential enough to siphon off Tory votes and allow Labour to get back in. Letting ‘Red Ed’, a self confessed socialist in to power is a high price to pay for ideological purity.
UKIP picks up Labour voters too, who are hardest hit by mass immigration.
It’s the Tories’ ideological impurity that would allow Labour back in, not UKIP.