This petrol station is the nearest one to junction 11 of the M4 and yet offers the best prices…read morearound for petrol and diesel. It's usually these places that charge a premium.
I prefer filling up here than at, say, Morrissons because although the price is the same, you know what you're putting in your car when you fill up at Shell. I really think that this fuel goes further than supermarket stuff.
There's a cashmachine to the side of the shop too.