Just popped into co-op to buy a multi-pack of chocolate bars, and saw Snickers 4 for £1.
I'm guessing they'll be this price in everywhere as "4 for £1" is printed pretty large on the pack. (See photo)
These are the full size (58g) bars, not the lame snack size bars.
25p a bar, much better than the 50p I pay for a bar in the local shop! :)
A delicious and nutritious snack!
P.S: I know Snickers have been 5 for £1 before, but as far as I'm aware they're not any more..