Sir Julian Lewis: I am sure that we wish the Government well in what they are trying to do. I gather that the International Air Transport Association highlighted only last week that, at the moment, sustainable aviation fuels cost approximately five times as much as conventional jet fuel. Will she explain how the measures in the Bill will bridge that gap to make it economical?

[The Secretary of State for Transport (Heidi Alexander): Supply is constrained at the moment; the UK has one commercial production facility, in Immingham. We need to build investor confidence to commercialise some of the sustainable aviation fuel demonstration projects around the country. More supply and lower prices are good for the aviation sector and, ultimately, good for those who wish to fly. ... ]