Political Parties and Elections Bill

My Lords, I have one query on which the noble Lord can no doubt help me. What happens if the two nominating officers—presumably there will be one from each of the two parties—disagree on the replacement? They might have been in agreement at the previous election but then, as the noble Lord pointed out, lost the MEP two or three years later. The noble Lord does not think that there should be a by-election under STV, because that does not work on these occasions. That is another good reason for staying well clear of STV. So what do we do when two nominating officers who previously were on very good terms but no longer are, cannot agree on a successor?