Pack of 18 Walkers, at the Co-operative/Tesco instore for £1.99 - I assume it's branch-wide. Flavours are:
6 X Roast Chicken
6 X Steak & Onion
6 X Smoky Bacon
Not sure about Co-op, but the deal ends on 23/11/2010 for Tesco.
First time posting a deal, so be kind please *cowers* :)