The British Conservatives will have to reckon in the European elections with strong losses. Also, the Prime Minister May want to avoid participation in the vote. However, in the Brexit-the mess you ran out of time.
The British voters will definitely participate in the European elections. The vote will take place in the British Isles on the 23rd. May - three days before the election in Germany. The Cabinet member, David Lidington, announced. Even if the Conservatives and Labour to agree on the adoption of the Brexit agreement, the time too short, to allow the various documents to ratify such an agreement before the election.
You will now "redouble efforts" to keep the Brexit-delay as short as possible. Ideally it would be, if the elected British representatives of the people anträten their mandates in the European Parliament.