A basket of 24 staple food products from Sainsbury’s cost£30.38 at Sainsbury’s, the study showed. Asda’s comparable basket cost£30.43 and at Tesco it was£31.15.
Asda has been found to be the cheapest grocer for most of the last year, other than in June 2008, when Tesco replaced it.
However, over the past 12 months the cost of the Sainsbury’s basket has risen 13.4 per cent, compared with 19.2 per cent at Asda and 20.5 per cent at Tesco.
MySupermarket.com found that food and drink prices rose 4.9 per cent in the 12 months to February.
MySupermarket.com spokesman Jonny Steel told The Daily Telegraph: “Consumers are yet again seeing considerable increases on the price of their everyday food items.
“With increases such as this, many shoppers are turning to cheaper options where possible and surrendering brand loyalty in order to beat the increases.”