Sir Bruce also said cosmetic surgery deals, such as buy-one-get-one-free offers and handing out free breast surgery as prizes in raffles, were a "particularly distasteful" way of incentivising people to go under the knife.
The idea is to strip away the complexities of buyonegetonefree deals and other special offers and find out which supermarket really offers the best value.
But the BRC questioned the report's link between promotions and food waste, highlighting a UK government survey that showed buy-one-get-one-free offers were becoming rarer.