Tesco's brand bags of 20 chocolate fun bars (weighing 414g) are not actually made by tesco and are infact made by MARS!!
Crazy Caramel = Mars
Wild & Whippy = Milky Way
Nutty Nougat Caramel = Marathon/snickers (what ever they are called now)
Crunchy Caramel Biscuit = Twix
Cool Coconut = Bounty
They are only £1.36 for a pack of 20 (four of each), so there must be a saving of perhaps £2 if you were to buy the Mars bags! (sorry not sure of correct price saving)http://www.tesco.com/superstore/xpi/9/xpi62965589.htm