>without wholesale rack prices as a baseline The US government publishes data on this (eg. https://www.eia.gov/petroleum/gasdiesel/ https://www.eia.gov/petrole

>without wholesale rack prices as a baseline The US government publishes data on this (eg. https://www.eia.gov/petroleum/gasdiesel/ https://www.eia.gov/petroleum/gasdiesel/). The UK government might have something similar. Barring that, you can use Brent crude as a proxy.