Two varieties of Whiskas jelly cat food pouches are two for £3.60 (so £1.80 each) in-store at Waitrose with MyWaitrose card & Pick Your Own Offers. Plus a free tea/coffee and newspaper too. Offer ends 23 Aug.

The specific products are:
Whiskas poultry selection in jelly pouch cat food 12x100g
http://www.waitrose.com/shop/DisplayProductFlyout?productId=49810
Whiskas favourites selection in jelly pouch cat food 12x100g
http://www.waitrose.com/shop/DisplayProductFlyout?productId=13730

To get this deal you need a MyWaitrose card. Order one from
http://www.waitrose.com/content/waitrose/en/home/mywaitrose/mywaitrose_welcome.html
You then need to add the product(s) to your "Pick Your Own Offers". Do that at
http://www.waitrose.com/content/waitrose/en/home/mywaitrose/pick-your-own.html
Or use the iOS or Android PYO app:
http://www.waitrose.com/home/mywaitrose/myw-pyo-apps.html

£1.80 is only 5p more than Lidl's own-brand pouches. According to MySupermarket best price elsewhere is three for £8 (£2.67 each) at Tesco.