David Davis, the Brexit secretary and Michel Barnier, the EU’s chief Brexit negotiator, meet in Brussels today for the first of four days of talks on Britain’s withdrawal from the European Union.
These are the first substantive round of negotiations between the two sides, although information has been exchanged between officials in the interim
The aim is to ensure that “sufficient progress” is made between the two parties by October for talks on trading terms and the UK-EU future relationship to begin. As Mr Barnier has said: "the clock is ticking".
Both sides have called for “constructive” talks, but tension is never far from the surface with private frustrations audible on both sides.
Here, we look at five possible flash-points in this week’s negotiation.
'Solid foundation' set on first day of Brexit talks
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