I think something's wrong there. Some of the prices LOOK to be ex-VAT but including fuel tax, and others inc VAT.
Jersey at 51.5p looks about right, and that's tax-free. Add 27.34p fuel tax, and you're at 79p or thereabouts, which is around the price charged by most fields I visit (+/- a few pence). Then add VAT and you're at 93p or thereabouts (ditto).
If the site said "inc VAT" or "Ex VAT" it would be a help!
Those North-of-Scotland fields do look to be a bargain, whatever! I see Aberdeen fuel is now "free"!