I can give you a better estimate for a remarkably similar trip I just did on Wednesday: Lancashire to Dundee, back through Fife. Round trip was 533.1 miles at 58.2MPG (not the best I've squeezed out of this ES, but there was some twisty fun had 👌). Full tank before departure, 1/4 tank left at return, it took 41.6L at same local/pump on return. Extrapolating to your trip that would be £67 done in mine at £2/L. That's a £39 differential for that trip compared to what Chris estimated his energy would cost. Price difference between mine and the long range model 3 I test drove and was considering is about 25K, or about 641 similar trips to break even at current ridiculous petrol prices, and closer to 1121 trips at petrol prices pre-war.
Don't get me wrong, I like EVs. We have a 2017/18 model S, it fits my dad's lifestyle. It just doesn't fit mine or dare I say the majority of people's.