And here's the big kick in the teeth of all of this...
A lot forecourts are branded franchises, the biggest owner of these franchises is a company called Euro Garages (you may have heard of them), they are recognisable across all the brands due to the EG logo
Now these franchises have the ability to set their own prices (I suspect there's a lower limit from the refiners). EG have always been priced highly for fuel. So then what happens is EG force the price up everywhere because all the companies set their prices to what the market will bear as they search all the local prices and set them accordingly (even the supermarkets do this)
Now moving on to supermarkets, pretty much everywhere I've been, ASDA are usually the cheapest but ASDA generally have no staff, they are all pay by card at the pump and that's how they undercut the rest, much lower staff costs.
Have a guess which garage forecourt company have made so much money by jacking up the fuel prices that they managed to buy ASDA from Walmart a year or so ago?
Yep. Euro Garages. So Euro Garages now have a position where they control the top and bottom ranges of fuel in this country