A draft deal aimed at meeting David Cameron's European Union reform demands has been unveiled.
David Cameron hailed the proposals for Britain's future relationship with the European Union as 'real progress' but said there was 'more work to be done'.
The blueprint, which has been published in Brussels, sets out plans for an 'emergency brake' on benefits for migrant workers, as well as measures to give national parliaments more power to block EU laws.
European Council president Donald Tusk released the proposals following intensive discussions with the Prime Minister and UK officials.
The document paves the way for an in/out referendum in June, provided it is agreed by all 28 national leaders at a crunch Brussels summit on February 18-19.
Mr Tusk said the package was 'a good basis for a compromise', adding that 'there are still challenging negotiations ahead. Nothing is agreed until everything is agreed'.
The Prime Minister dismissed criticism of the draft, insisting that the measures put forward showed that change could be achieved.
He said: 'So, real progress, more work to be done, more detail to be nailed down, but we said we needed to deliver in four key areas, this document shows real progress on that front.'
Mr Cameron will visit Poland and Denmark on Friday, as he embarks on a whirlwind charm offensive to persuade the other 27 EU leaders to sign up to the Tusk package in Brussels on February 18-19.
Donald Tusk has warned that failure to finalise Britain's renegotiation deal at a Brussels summit next month would 'compromise our common future'.
In a letter to EU leaders unveiling a draft package, Mr Tusk said the process had been 'difficult' and there were still 'challenging' discussions ahead.
However, he said there was now a 'good basis for compromise' and officials would be meeting on Friday to try to hammer out the details.
'The clear objective is to have an agreement of all 28 at the February European Council. To succeed we will all need to compromise. To fail would be compromising our common future,' he said.
Mr Cameron will make an oral statement to the House of Commons on Wednesday following Prime Minister's Questions, to update MPs on his response to Mr Tusk's package, said Downing Street.
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