Budget supermarket Lidl has been declared the 'cheapest supermarket' for the last three months, but how cheap is cheap?
According to Which? the retailer has come up trumps in the list of supermarkets since November, when it was Aldi who took the top spot.
As part of its analysis, Which? compares the prices of a basket of 23 items each month to see where shoppers are paying the most - and the least.
