Conservative grandee John Redwood has dismissed the "so-called" eight Tory MPs allegedly considering defection to Ukip as "figments of Ukip's imagination".
"Dream on Ukip," the eurosceptic MP for Wokingham and former Wales Secretary told Radio 4's Today programme.
"I treasure the words of Mr Carswell which he was speaking yesterday. He said that we need to deliver an in-out referendum, he said it would only happen if David Cameron was prime minister," Mr Redwood said.
"He said we must do nothing to make the prospect of a referendum less likely. He was super-loyal until yesterday."
More top news
The suspected attack happened in Belfast near a filling station.
Ewan McGregor was joined by co-stars Jonny Lee Miller, Ewen Bremner and Robert Carlyle at the world premiere of the Trainspotting sequel.
The team of best friends took on the 'world's toughest rowing race' in memory of one of their brothers.