Reduce cost of driving to PC shops in UK

Oh, OK, I was desperately trying to shoehorn this thread into being on-topic, but anyway...

Just heard about this site that tells you where to get the cheapest petrol/diesel in your area (UK only).

http://www.petrolprices.com/

It's being constantly updated so it could all add up to a decent saving, over time. You have to register (it's free) to use the service, but I think it's worth it.

Hmmm, I was a bit surprised to find my local Tescos garage is only 4th cheapest in my area! Just goes to show.

This site is really cool. Give it a go! :)