Scotland is on the brink of discovering if a just transition away from fossil fuels will be a reality or just a slogan. There is a plan for Grangemouth, Scotland’s only oil refinery, to become a world-leading hub for sustainable aviation fuels.

But the biofuels market doesn’t yet exist at scale. It requires the UK government to shape it, providing a price floor for Sustainable Aviation Fuel, so as to reduce investor risk.

If Scotland were an independent country it would be able to focus on this as a national priority. As it is, the Scottish government has no power over energy regulation. It has to sit on its hands and wait for Westminster, which has so often shown itself indifferent to Scotland’s needs, to act