I've been using this website since I first started driving a few years ago. I stopped using it for a while when petrol prices seemed to plateau and were the same at most places but now that everywhere is slashing prices this a great website to check on your phone when out and about to see what the best price for petrol/diesel is near your location. It just occurred to me there that I've never seen it mentioned on HUKD before and couldn't find it in a search so hopefully it'll help someone. There's nothing worse than filling up your tank then driving past somewhere even just 1p cheaper on the way home! You do need to sign up but it's free. You get email alerts but I just marked them as spam and check it when I need to.