Although I believe that both Vince Cable and Frank Field would both be ideal candidates, I would hate to see either of them emasuclated into the post of Speaker where they could no longer contribute to the political debate. Both of them have a huge amount of sensible things to say. I want to continue hearing both of them keep saying them. Goodness knows, there a few enough honourable politicians sitting on those green benches these days. We can't really afford to lose any more of them.