Nice couple of links you've got there Dmas and interesting to type different postcodes in and see what prices we're looking at across the country. It's certainly true that a fair amount of the price we pay for petrol is for taxes
and then to rub salt into the wounds even more a lot of those taxes we pay we see wasting in ridiculous projects, or go as benefits to the amount of foreign people coming into the country, or even back to their families at home(in other countries) 
Thats a great diagram of America and gives a real idea as to where prices are at it cheapest, compared to the high prices in some of the States.
I can say the same for the US, and make it a double, no tri... quintuple. 
At least that makes 2 of us that are disgusted and very angry with the number of foreign people coming into our homeland
many times over!
I have no issue with foreign people coming the US. We have always been and aways will be made of people from all over the world. The problem we have now is some 12 billion illegal aliens who have crossed the borders and are working, or subsisting on whatever they can scrape together. This is mostly felt in the southwest along the Mexican border, but there are a number of them scattered throughout. Many of them pay taxes and contribute to the economy, but (from my experiecnes growing up and living in California) most of them don't. I used to be an assistant manager at a restaurant, and I know many of the legal Mexicans we had working for us either lied on their tax forms, or didn't pay taxes at all. They came in, worked a couple years, lived 5 or 10 to a house, seneding about 60%-70% of the money they earned home to Mexico, and then bolted to live on the cumulated wages. That's a tremendous drain on the economy.
That's just a small piece of the drain. I won't even go into the companies that have closed in the US and moved to either Mexico or China or somewhere to take advantage of cheap labor.