MSE have put this on their newsletter today:

https://www.petrolprices.com/

Not sure how accurate as I think ASDA in Leeds may be cheaper. FL2 MY10 TD4 GS traded in at 2 years
FL2 MY13 TD4 GS Current

I was on that site for many years, and always found it to be pretty accurate, not sure how long it takes to catch up after a price change though. I dropped off the site when they started chucking in loads of adverts and things to my inbox with the option to not see them buried deep in the small print.

Just seen this morning that the Chancellor is crying because he reckons that since 2011 they have lost £47b in fuel duty revenue so fuel duty may rise in the next budget.