David Cameron will suggest changes to a proposed “emergency brake” on in-work benefits for EU migrants when he meets the European Council president later.
EU officials have suggested Britain could use the brake for up to four years, but would have to prove public services were under excessive strain.
It could be imposed within three months of the UK applying, if EU states agree.
But Mr Cameron will tell Donald Tusk he wants the brake in force straight after the EU referendum, with no time limit.
The prime minister will meet Mr Tusk at Downing Street to finalise a package of measures to put to EU leaders ahead of a summit on 18-19 February.
As part of his attempts to renegotiate the UK’s membership of the EU, Mr Cameron had proposed denying in-work benefits to all EU migrants until they had been in the UK for four years.
However, EU leaders rejected this and proposed the “emergency brake” as an alternative.
The proposed brake, full details of which have not been confirmed, would allow any EU state to deny in-work benefits to new arrivals for up to four years – but only after proving services were under strain and securing the approval of a majority of other EU states.
Mr Cameron said the current proposal was “not good enough”.
He is expected to tell Mr Tusk the brake must come into force immediately after the UK’s referendum on EU membership, and must remain in place long enough to stem EU migration to the UK.
He will also say the brake should be seen only as a “stop gap” while a more permanent solution is found.
The PM will tell Mr Tusk he is prepared to delay the referendum, which has been promised by the end of 2017, until he is satisfied with the deal on offer.
As well as restricting access to benefits, Mr Cameron wants extra powers for national parliaments to block EU legislation, measures to protect non-euro states and exemption for Britain from the EU’s ambition for “ever-closer union”.
UKIP leader Nigel Farage has dismissed the proposals under discussion as “pretty thin gruel” which will not deter EU migrants from moving to the UK.
David Cameron’s four main aims for renegotiation
- Integration: Allowing Britain to opt out from the EU’s founding ambition to forge an “ever closer union” so it will not be drawn into further political integration
- Benefits: Restricting access to in-work and out-of-work benefits to EU migrants. Specifically, ministers want to stop those coming to the UK from claiming certain benefits and housing until they have been resident for four years
- Sovereignty: Giving greater powers to national parliaments to block EU legislation. The UK supports a “red card” system allowing member states to scrap, as well as veto, unwanted directives
- Eurozone v the rest: Securing an explicit recognition that the euro is not the only currency of the European Union, to ensure countries outside the eurozone are not disadvantaged. The UK also wants safeguards that it will not have to contribute to eurozone bailouts
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