Found these Whiskers Katzinis at my local ASDA Great Bridge instore. Marked to to reduced 32p per pack. They did have another type reduced to 32p but I forgot which they were and they ran out. The cashier let me purchase 16 packs with no problem. Usually at around £1.28 so 96p saving. Not sure if nationwide.
9th August - still available in my local store and they have also added another reduced one, so it's still available!