Butchers for meat, farmers market for fruit and veg. They grow it right there and I know it is fresh with no chemical. It means we eat seasonal but I like it. And then we go to Sainsbury's, Tesco, and Asda in that order for staples.
Since we have stopped buying meat and veg at the grocery store H and I have felt a lot better. About a month ago we got a horrible case of food poisoning and we can only think it came from some chicken we picked up at the grocery store. It was horrible we were sick for over a month and put on the infectious disease list.
I will say we mainly go to Sainsbury's because it is on the same estate that H and I work. I have not found it to be anymore expensive than Tesco or Asda.