Michel Barnier
German conservative Manfred Weber will announce his candidacy on Wednesday to front the centre-right in European elections next May.
EU negotiator Michel Barnier warned Britain Monday to resolve the issue of its post-Brexit border with Ireland by a June summit.
Michel Barnier warned Monday that Britain faced "unavoidable" trade barriers after Brexit if it also quit the bloc's single market and customs union as planned.
The European Union wants a transition period after Brexit to end no later than the last day of 2020.
EU Brexit chief Michel Barnier said Sunday that he is making contingency plans for the "possible" failure of divorce talks with Britain.
Macron said on Thursday that the EU's 27 remaining nations were all united in their stance on Brexit behind Michel Barnier in talks on Britain's withdrawal.
Germany said on Friday that It is up to Britain to move Brexit talks forward, warning that "time is running out" for London to negotiate the deal it wants.
British officials arrive in Brussels on Monday hoping to push the EU towards talks about post-Brexit ties.
The British government on Thursday begins the mammoth task of overhauling its legal system in time for Brexit
After leaving the EU, Britain has set a new special status for immigrants from the European Union.