I am listening attentively to the hon. Gentleman. A cross-party group of us are very interested in the quality of water in our rivers and streams. Indeed, in Huddersfield, I chair Greenstreams, which looks at the issue locally. Will he look with us at the quality of the Thames, and how its high levels of pollution were turned around right on our doorstep? Of course, building the new Palace of Westminster will have a vast impact on that river.