BRUSSELS (Reuters) - The European Union's 27 leaders will meet at the end of April to agree their negotiating lines for Brexit talks, after London sends in a formal notification that it wants to leave the EU on March 29th, three sources in Brussels said on Tuesday.


The meeting is a necessary step before the negotiations between Britain and the 27 remaining EU states can start formally.


(Reporting by Jan Strupczewski and Gabriela Baczynska)