Some of the UK’s biggest food manufacturers have launched a campaign to promote nutrition labels showing percentages of guideline daily amounts (GDA) of sugar, salt, fat and calories per serving. The launch comes at the same time as the FSA’s own campaign to raise awareness of its traffic light labelling scheme, which it says its research shows is easier to understand. The GDA campaign is supported by a coalition of the UK’s biggest food and drink manufacturers, as well as supermarkets Tesco, Somerfield and Morrison.