What are the most popular junk foods and candies and soft drinks in the UK? Im moving there from USA?

Like are there skittles, doritos, mountain dew, root beer, erfinger, dr pepper, gatorade, blow pops, nerds, tootsie rolls, country time, swedish fish, twizzlers,reeces, jones, monster energy drinks, mike and ikes, laffy taffy, crystal light, sun chips, salsa, cheetos, fritos...any of these regularly sold throughout england? Please answer as much as you can!!!!!! Thank youuuuuuuuuuuu