I think someone's already mentioned it but "Bundaberg" from Waitrose is really good, it's the proper old recipe, it's delicious. "Carter's" isn't bad but it's a little sweet - I think Bundaberg is of a higher quality. Plus you can buy Bundaberg in glass bottles in small packs of four for relatively cheap, so it adds a bit of freshness. Either that or just go into London and get all the American stuff. Iv'e never seen root beer in Budgens, there should be some petition to bring this stuff over here properly. I'd buy it constantly, such a nice drink.