I tend to think there should be three or four. To avoid having too many parties in the House of Commons and compensating for small political parties, the transferable vote helps them find out where they stand and helps them look after their voters. Having three or four members per district would be a huge improvement over the current situation. It is the way to minimize the danger of instability that is always condemned in the case of proportional representation. However, I would not be upset if there were six or seven.
On September 22nd, 2016. See this statement in context.