UK Prime Minister Theresa May will return to Brussels on Saturday, after failing to finalise a Brexit deal at a meeting with European Commission President Jean-Claude Juncker.
She says some issues still need resolving ahead of a summit of EU leaders in Brussels on Sunday.
The European Commission says there's been 'very good progress' towards a Brexit deal which contains a political declaration on the future relationship between Britain and the EU.
But the lack of final agreement yet has raised fears Sunday's summit could be inconclusive, or not happen.
UK correspondent Olly Barratt says there are a number of unresolved issues.
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