At their worst prices these would cost £140 a month for 2 snacks a day ! £2.00 each.. I found this comparing thing so hope it's of any use
http://www.mysupermarket.co.uk/brands/atkins_in_tesco.html?store=ASDA
http://www.mysupermarket.co.uk/brands/atkins_in_tesco.html?store=ASDA