Tesco (or some of the bigger stores) are now selling a wide range of American prodcuts, including Lucky Charms (normal and chocolate, 453g) Jolly Rancher drinks, Flipz pretzels, peanut chocolate, peanut spread, peanut and jelly spread, root beer, Wonka stuff and quite a few other things.
I believe a lot of people have been waiting for Lucky Charms to hit the supermarkets. Maybe this is the start and Asda will follow, especially as Asda are owned by Walmart. They did have an end date of the 23/10/12, so not sure what the future price will be. Also I'm guessing this will be just in the bigger Tesco stores around the country. I have no idea when they started selling these things (and which stores have them) and if they will continue to sell them.