Fixed-term Parliaments Bill

The point is that the coalition Government have set their heart on five years, so that is the proposition that we are examining. I was trying to advance the arguments that were presented to the House as recently as 1911, but the post-1945 chart, featuring 17 or 18 elections, shows that, in all but four cases, the average length of a Government has been about four years. The principle behind that is fairly closely related to what Asquith said. It is right that there should have been a recent renewal of a Government's mandate; it is right that a Government should be mindful that they face an election. But if we are to adopt fixed-term Parliaments, what is the right period, given that the Government concerned command a majority in the House?