Asda has to be the worst, Lidl/Aldi have little choice, but the basics are dirt cheap and if you have ethnic shops near you. You can usually get the missing spices/sauces etc for way less. We now do 90% of our shopping in Lidl, getting a few things from ethnic shops, and a few other things from other places as we can get milk for example much cheaper than in Lidl.

Asda's basics are similar in price to Tescos/Sainsburys, but seem to be much lower quality. Anything ready prepared is near inedible, so you'd be better off shopping either in Lidl/Aldi for cheaper prices, or Tescos/Sainsburys for edible ready meals. I don't understand the point of Asdas.

It also seems they don't do them anymore, but they also used to do Sardines in oil for like 40p a tin, and sardines in oil with lemon for 80p and the only difference in the tins was a little bit of text on the front. Well I went to get my standard sardine order, and ended up paying something silly for it. Turns out the tins got mixed up and I'd picked up mostly lemon ones. Which doubled the price, and the ones in Lemon are basically inedible.

Still bitter about that.