I thank the hon. Gentleman for his intervention. In fact, I was just about to talk about hydrogen, so that is a brilliant segue.
The Transport Committee visited the engineer who first retrofitted a conventional train with hydrogen technology. We talk about the need to electrify and move away from diesel, but 2% of the national grid is taken up by electrified rail, and if only 40% of energy is coming from renewables, that means that 60% is still unpleasant. We need to invest in hydrogen, and it is very exciting that we have the engineer in this country who will enable us to do just that.