Popped into a tesco metro yesterday and found multi-packs of various chocolates on reduced price. I believe this deal has been going on for a while now but they still have a lot of stock left (AFAIK, their shelves were full). For example:
MARS, pack of five = £1.00 and pack of 10 bars = £2.00 (20p per bar)
TWIX, twin finger pack of three is reduced to £1.00 (33.3p per twin finger)
GALAXY, pack of four choc bars is reduced to £1.00 (25p per bar) as well. Same kind of offers are on other chocolates as well (bounty, kitkat chunky,etc)
Guys! i know excess of sweet is bad for health but this price is awesome for fillers. Enjoy!!! ;)
This deal may be store specific. But i visited a few stores in London and almost every store had this promotion.