Fixed-term Parliaments Bill

My right hon. Friend is entirely right that the judgment about how long a Parliament should last is not an exact science. During the debates in Committee, I opted for four years because I felt that that was more appropriate. It would avoid the clashes and mean that we would engage regularly with our electorate, which we should all be doing. It would be important in helping to keep us all in touch with our constituents. Would he say more on the thinking behind the decision to have five years rather than four?