Keep your eyes open instore at waitrose for reduced items. The ones you want are the items that are on deals . For example I bought 2 prawn dishes that were reduced to 98p from 3.29, these were also on a deal 2 for £5 which would normally save you £1.58, this also works on reduced items so I bought 2 for 42p total. Amazing food at amazing prices. I have also had some deals come out to minus of my bill, but make sure you have other items in your basket as im sure they wont pay you for your items if this is all you have!
PLEASE POST SOME OF YOU DEALS YOU HAVE GOT FROM WAITROSE TOO!