Cheapest Petrol?

This is a rather unlikely looking picture of a petrol station that I regularly pass. Unfortunately, the prices aren't as generous as they seem - there's a missing pound sign hidden by the angle of the shot (you may have to view the image full sized - I think my HTC Magic Android phone's seriously brilliant generally but the camera isn't by any stretch of the imagination a good one I fear, especially when taking photos from the top deck of a bus :-)).

Despite the fun thrill of seeing a petrol station offering petrol at only a penny and diesel for tuppence, this petrol station is still one of the cheapest around with both 'only' a bit over a pound (approximately ~$1.50 at current exchange rates).