Large bags of Walkers Sensations crips - 69p - in 99p shop in Croydon (yes - not being sold for 99p!!), not sure if this offer is nationwide. Just be careful - some have decent sell-by dates, others not!
I think the reason these are being sold cheep is due to Walkers changing the packaging from White to Black, and varying the pack size, at the moment - the cheepest price for same item in the major supermarkets seams to be £1.50 / 150-175g
Hope that helps someone out there ....
PS - this is my 2nd posing, almost put-off, after being flamed for an earlier genuine offer that seamed to confuse some others !! .... lets see how this goes !!