UK's Cameron tells ministers: back my EU strategy or quit

Britain's Prime Minister David Cameron speaks during a visit to the construction site of the Crossrail Farringdon station in London, Britain June 4, 2015. REUTERTS/Alastair Grant/pool

By Andrew Osborn KRUEN, Germany (Reuters) - British Prime Minister David Cameron sought to quell fresh signs of rebellion in his Conservative Party over Europe, warning ministers to back his European Union strategy or leave his government. Speaking on the sidelines of a meeting in Germany of the Group of Seven (G7) industrial nations, Cameron, who has pledged to renegotiate Britain's EU ties before holding a membership referendum, signalled he would not tolerate dissent. "If you want to be part of the government, you have to take the view that we are engaged in an exercise of renegotiation to have a referendum, and that will lead to a successful outcome," he told reporters on Sunday. "Everyone in government has signed up to the programme set out in the Conservative manifesto." Cameron spoke out after a group of over 50 of his own lawmakers said they were prepared to join a campaign backing a British EU exit, or "Brexit", unless he achieved radical changes in the bloc. Cameron's spokeswoman said his comments applied only to the renegotiation period and he had not yet said whether ministers would be allowed a "free vote" in the referendum itself. She said newspapers who felt Cameron's warning had covered the referendum period too had "over-interpreted" his words. "UNWISE STANCE" Cameron, who has promised to hold the referendum by the end of 2017, says he is confident he can get a deal that will allow him to recommend Britons vote to stay in the EU, which they joined in 1973. He has said he needs the EU to alter its founding treaties so that any changes he secures are safe from legal challenge. Cameron is vulnerable on the home front, commanding a mere 12-seat majority in the 650-seat House of Commons. A rebellion over Europe among his own lawmakers could derail his wider agenda. Speaking before Cameron's office tried to clarify his comments, senior Conservative lawmaker David Davis said Cameron's stance was "unwise". "There is a risk what we may end up doing is turning a decent debate into a bitter argument," Davis told BBC Radio. "This doesn’t show a great deal of confidence in the outcome of those negotiations, that he has to say now: my way or the high way, stay and obey the line or leave." Graham Brady, the chairman of a powerful committee of Conservative lawmakers, said in an interview with Total Politics magazine Cameron should tread carefully and work with Eurosceptic MPs rather than try to "force them into places where they can’t go". Eurosceptic Conservatives already feel Cameron has framed the referendum question in way a that favours a vote to stay and are angry he has decided not to impose restrictions on government campaign activity in the run-up to the vote. The Times reported campaign spending limits would be increased by 40 percent for the referendum, raising fears among those backing an exit that they will be outspent. Some Eurosceptics have suggested they feel so strongly that they might try to amend a law going through parliament to enable the referendum to take place. The law is expected to be debated in parliament on Tuesday. (Additional reporting by Kylie MacLellan in London; Editing by Guy Faulconbridge and Andrew Roche)