Royal Naval gas turbines run on high grade diesel fuel, I know this for when I used to organise fuel barges for them, I remember the Arrow took on 250 ton in France, but on arrival in Devonport, it was all offloaded to sullage because it had a green dye in it, AVCAT is a higher grade fuel with it's own problems, But what annoys me is the lack of confidence and knowledge base in this country that we cannot afford to lead in new tech cats, this country once lead the world on innovative ideas and design with past carriers, not including the very small cvh's.