It is a pleasure to follow Matt Western. When I was growing up politically, one of my great mentors was Sir Keith Joseph. He said that one of the greatest challenges we were going to face in the future of the world was water shortages and the resulting movement of populations around the world, and I think that is starting to come very true today. My mother was always very keen on saving water. I do not know how many hon. Members will remember doing so, but she used to put a brick in the cistern to make sure that she did not use too much water when flushing the lavatory.
Aside from that, may I congratulate my hon. Friend Mr Walker on obtaining this debate? It would be fair to say that he and I have spent many a happy hour, with Paul Jennings, sitting beside one of the purest and clearest chalk streams, the River Chess, just outside London. It is not even at the end of the Metropolitan line; it runs alongside the Metropolitan line. It is accessible to the public, and it is one of those wonderful habitats and environments that can really bring people peace and tranquillity. People can leave this world behind as they sit there and, in the case of my hon. Friend, try to attract a trout to the end of his line.