Fixed-term Parliaments Bill

I think I must have wandered over to the Government Benches and left my notes for my speech there, because the hon. Lady seems to be reading them out. I can see why it might be practical to say that the next general election should be on 7 May 2015. However, against her argument, I cannot see why it is a good constitutional principle—one that should be set in legislation—that Parliaments should sit for five-year terms.