My hon. Friend may have to wait a little while for the hydrogen car. I think that there will be some hydrogen cars, but what there will be many more of before that are hydrogen lorries. There is no doubt that the one vehicle where we have a problem is the lorry. It needs huge power for towing loads and the diesel engine, whether we like it or not, has that capability. We actually need a hydrogen lorry, rather than an electric lorry, because at the moment an electric lorry
would have to carry most of the weight that it can carry in batteries in order to deliver the power. I can therefore see hydrogen lorries being very effective in the long term.