Brussels' top official has insisted he is "confident" that a deal will be reached over reform of Britain's relationship with the European Union at a crunch summit tonight.
European Commission president Jean-Claude Juncker said he was "convinced" that the UK would remain a "constructive and active" member of the 28-nation bloc.
David Cameron is heading to Brussels for crucial talks with EU leaders, with key elements of his demands for change in Britain's relations with the EU still in dispute.
Mr Juncker said: "I'm quite confident that we will have a deal during this European Council."
He added: "I'm convinced that Britain will be a constructive and active member of the European Union."