Nestle Extrafino Milk Chocolate 125g for 25p at Poundstretcher.
This was at Leigh store.
* I've edited price, as this is scanning for 10p- thanks to poster housebrick for info and receipt proof.
I also saw Massive 875ml bottles of Heinz Creamy Black Pepper Ranch Sauce for 49p
Heinz tomato ketchup for 50p ( think that has already been posted tho?)
Also, 500g tubs of Swizzels for £1.99. Not sure if that is mega-cheap, but doesn't seem to be many swizzels tubs around atm, according to a search.