10 Jan 2017 --- Leading supermarkets in the UK, including Tesco and Sainsbury’s, are to display signs warning shoppers not to waste food, under a pilot scheme spearheaded by the food waste charity Wrap. The move comes as figures reveal that £13bn ($15.8bn) of edible food was needlessly thrown away from homes in 2015 in the UK, according to the government-funded Wrap.