David Cameron takes swipe at Boris Johnson over EU deal

British PM dismisses opponents’ claim that vote to leave could lead to negotiations on better deal for UK

David Cameron took a swipe at Boris Johnson over the EU referendum as the two top Tories came up against one another in the House of Commons for the first time since the London mayor declared his support for Brexit.

The British prime minister used a statement to MPs to dismiss the idea, reportedly floated by Mr Johnson, that a ‘leave’ vote could be a prelude to securing a better deal in a second referendum.