• Former leadership candidate to pour scorn on Cameron deal
  • Questions whether `emergency brake' will affect migrants

David Davis, who came second to David Cameron in the 2005 race to lead Britain’s Conservative Party, is to declare himself a supporter of the campaign to get Britain out of the European Union.

Davis, a minister in the previous Conservative government under John Major, will say in a speech in London on Thursday that Cameron’s renegotiation of Britain’s membership terms is insufficient to convince him that the benefits of EU membership outweigh the costs.

In particular, he’ll attack the prime minister’s “emergency brake” on in-work welfare payments to EU workers, which Cameron has suggested will dissuade people from coming to Britain. Davis will say that the average Romanian wage of 400 pounds ($580) a month is less than a third of the of the 1,300-pound monthly minimum wage in Britain.

“The whole concept of an emergency brake is flawed.,” Davis will say, according to speech extracts released by his office. “Migrants are coming to Britain from Eastern Europe not to claim benefits but to earn more money. No amount of tinkering with our welfare rules will make a blind bit of difference to immigration numbers and the prime minister is being disingenuous to pretend otherwise.”

Cameron on Wednesday spent more than two hours defending the deal in Parliament, with most of the hostile questions coming from his own Conservative Party.

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