Local discount store had the 6 packs for 39p stacked wall to ceiling. The Chocolate & Chilli ones were 19p for six.
Since I had my staff slaving away inside over the sunny weekend I treated the office. As a totally meaningless sample poll only 1 out of ten thought the BB was "alright" (I thought they tasted like stale egg) and 3 out of eight (2 passed) liked the choc/chilli. :D