After arriving at Heathrow and picking up our rental car, we'll be heading towards Hampton Court Palace. Is there a grocery store enroute where we can stock up on bottled water, snacks and a good map of Engand and Wales? I've heard of Asda and Tesco. Does one supermarket have better deals overall on food and gasoline? On our return trip from York, is there a good place to fill up with gas nearby before returning our rental car to Heathrow?
I don't know about Great Britain, but gasoline prices here in the states have really jumped the past month. Thanks for your help.