David Cameron has indicated he is willing to discuss alternatives to his proposals for reforms of the EU welfare system.
His proposal for a four-year ban on migrants claiming in-work benefits while in the UK has been something of a stumbling block in negotiations so far.
In a press conference with Czech Prime Minister Bohuslav Sobotka, Mr Cameron said he was happy to discuss the proposals and welcomed any alternatives.
He has been working to persuade Slovakia, Poland and Hungary, as well as the Czech Republic, to support the plans.
David Cameron has arrived in Prague for the final stop on his diplomatic tour of Europe. The Prime Minister has been speaking to European leaders ahead of a vital summit next month on his demands for reform of the EU.
He arrived from the World Economic Forum in Davos where he had already made his case to a number of his fellow EU leaders.
While in the Czech capital, Mr Cameron will hold talks with his counterpart Bohuslav Sobotka and President Milos Zeman.
Mr Cameron said on Thursday if a suitable agreement is reached next month he will "sell it very hard" to the public ahead of the promised in/out referendum.
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David Cameron will head to Prague for the final leg of his diplomatic offensive ahead of next month's crunch summit on his demands for EU reforms.
In the Czech capital the prime minister will hold talks with his counterpart Bohuslav Sobotka and president Milos Zeman.
Mr Cameron travels to the Czech Republic after finishing his engagements in Davos, where he used the World Economic Forum meeting to push his case with a number of fellow EU leaders.
Mr Cameron insisted on Thursday he is in "no hurry" to secure a deal on a package of changes to Britain's EU membership at the upcoming Brussels summit in February, but if a suitable agreement is reached he will "sell it very hard" to the public ahead of the promised in/out referendum.
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Nigel Farage has said he is beginning to see the EU referendum "as being the people versus the politicians", claiming most Conservative politicians will "put their careers before their conscience" by backing the prime minister's position.
The Ukip leader told the BBC's Sunday Politics it might not matter what side politicians take in the debate over the UK's future in Europe, as "the more the politicians club together, perhaps the more the people will choose to vote against them."
"I think the chances of many people who are currently in senior positions in politics joining us, perhaps they diminish inevitably, but what you can't do is take away from ordinary folk out there scenes such as Cologne and saying to themselves in three years time all these people will have EU passports and will be able to come to Britain.
A former Conservative chancellor has dismissed David Cameron's EU re-negotiation as "inconsequential".
Speaking to Sky News' Murnaghan programme, Lord Lawson who is president of the Conservatives for Britain group also dismissed a claim by a new grouping of pro-Europe Tories that a vote to leave the EU would be "jumping into a void".
It is not a void. It is a place called the world, and we know the world quite well. It is not outer space. We do an enormous amount of business all over the world.
The former chancellor made clear that he would be voting to leave the EU whatever deal Mr Cameron was able to get in Brussels.