Aldi and Lidl have been named as the worst supermarkets for price rises - but both budget retailers still work out cheapest for customers.
New research from consumer champions at Which? show overall food inflation at Aldi over a year was 19.6%. This was followed by Lidl, where overall inflation stood at 19%.
However, both discounters still tend to be the cheapest of the big supermarket chains to shop in overall.
