Buying bigger packs of products including toilet roll, cheese, laundry detergent pods or discounted ketchup may not always mean shoppers get a better deal, according to a competition watchdog investigation of grocery prices.
The Competition and Markets Authority (CMA) said it had examined a basket of 26 items and found examples when shoppers had not got a better deal by relying on “rule of thumb” assumptions about what is best value in the first phase of an inquiry launched a year ago.
