Busy with a Brexit-focused election campaign, Britain will not nominate a representative for the new European Union executive until after its Dec. 12 vote, leaving the bloc seeking to hedge against any legal challenges arising from going without London. A British official said late on Wednesday that London would not pick a name until a new government is formed. This is problematic for the bloc, which wants to launch its powerful new executive European Commission under the leadership of German conservative Ursula von der Leyen as of Dec. 1.