Most Super Markets are very similar, they get away with these claims, because they are not technically lies. I recently went to a new Morrisons
( they claim to be the cheapest ), in Shirley Southampton and was amazed to see the ( to me) exorbitant prices and this sent me racing back to LIDL`s, still to me the cheapest S/Market around, the next best to me is ASDA. I occasionally use Sainburys for special products. I have lived in Spain ( and on my way back in Sept. ), where LIDL`s are in almost every Shopping Centre. If you have the time and energy, you should visit three or four Stores and compare prices, then buy the products you find cheaper in each. I am a single old man and have to watch the penny`s. Each Store has its "Lost Leaders" probably invented by Tesco`s, that are meant to draw you into their Store, so be very wary of these. Best Regards Peterpiper.