David Cameron and European Council President Donald Tusk are set for a "crucial" day of talks about the UK's renegotiated membership of the EU.<br />A meeting on Sunday night ended without a deal, though a Downing Street source said there had been a "breakthrough" on restricting benefits for EU migrants.<br />Mr Tusk said "intensive work" would be needed during the coming hours.<br />The aim is to agree a deal to be put to EU leaders ahead of a summit on 18 and 19 February.<br />An early deal would allow Mr Cameron to call a referendum on the UK's EU membership before the school summer holidays.<br />After their meeting over dinner on Sunday night, Mr Cameron tweeted that Mr Tusk had agreed to another 24 hours of talks before publishing the UK's draft renegotiation text.
