Summary
Weary EU leaders take up the cudgels for a second day Friday, still with "a lot of work to do" to prevent Britain becoming the first country to crash out of the bloc.
Earlier in the week, EU officials had hoped Friday would begin with an "English Breakfast," with a deal served up for final approval.
Others were less accommodating, especially French President Francois Hollande who insisted Britain could not expect to have a veto over other EU member states who want to press ahead with the European project.
The Czech premier meanwhile leads a group of four Eastern European countries that object to Britain's request for a limit to welfare benefit payments for EU migrants working in Britain for four years.
Cameron says he will back a 'Yes' vote in the referendum if he can cut a deal in Brussels.
Failing that, he has said all options are open, refusing to rule out the possibility that Britain could become the first country to leave the EU in its more than 60-year history.
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