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President of the European Commission Jose Manuel Barroso, center, stops to pose for a photo as he leaves after making a speech at Chatham House in London, Monday, Oct. 20, 2014. In a television interview on Sunday Barroso warned Britain it would lose international influence if its people vote to leave the EU in any future referendum. Image Credit: AP

London: European Commission President Jose Manuel Barroso told British Prime Minister David Cameron on Monday he risked upsetting allies and losing international clout if he pursued an anti-immigration agenda designed to please domestic voters.

Barroso delivered his warning as Cameron, who has pledged to hold a referendum on Britain’s European Union membership if he wins a 2015 election, adopts an increasingly hawkish view on curbing migration within the bloc and reviewing its freedom of movement principle.

Cameron hopes to persuade voters that his Conservative party has a workable plan to address their concerns over immigration, and of halting the growing support behind the hardline anti-EU UK Independence party (Ukip) which threatens his chances at next year’s vote.

Barroso, whose ten-year term as head of the EU’s executive body ends next month, warned Cameron on Sunday against trying to seek changes to the EU’s freedom of movement rules, saying they were essential to the bloc’s internal market.

In a speech at London’s Chatham House on Monday he went further, saying that by engaging in such rhetoric on immigration, Britain risks isolating itself in Europe and undermining its attempts to achieve wider reforms.

“It would be an historic mistake if on these issues Britain were to continue to alienate its natural allies in central and eastern Europe,” Barroso said.

“It is an illusion to believe that space for dialogue can be created if the tone and substance of the arguments you put forward question the very principle at stake and offend fellow member states.”

Cameron has broadly outlined areas in which he wants to win reform from the EU, such as migration controls, retaining lawmaking powers at a national level, and cutting red-tape for businesses. He has not given specific details however. Other British parties also want reforms, but there is no consensus on a renegotiation strategy.

Cameron has long said he would like Britain to stay in a reformed EU but British Foreign Secretary Philip Hammond said last week that the bloc would have to come up with a meaty reform deal if it wanted to avoid a break.

Friends

Barroso said that while he understood British voters’ concerns over Europe, the country has benefited from having the backing of other EU states on geopolitical issues such as climate change negotiations and sanctions against Russia.

“In short, could the UK get by without a little help from your friends? My answer is probably not,” he said.

The Sunday Times newspaper, citing unnamed sources, reported that Cameron wanted to cap the number of low-skilled migrants from within the EU who could register to work in the country.

Barroso said while there was great willingness among other EU countries to accommodate Britain’s concerns, there were clearly red lines that could not be crossed. He said he did not see how an arbitrary cap on immigration could be accepted.

On Monday Nick Clegg, the deputy prime minister and leader of pro-Europe junior coalition partner the Liberal Democrats, said Britain would not be made stronger or more prosperous by leaving the bloc. Cameron’s party was being pushed closer to EU exit by their “blind panic” over the rise of Ukip, he said.

“The Conservatives have now embarked on a strategy which has only one final destination, which is leaving the European Union altogether,” Clegg told reporters.

Cameron’s official spokesman said other European governments were also looking at the impact of immigration. The prim minister would continue to argue for reform, he said.

“Clearly changes are needed to the current arrangements...and that is what the prime minister is going to be arguing for.”