Many foods carry nutrition claims as well as nutrition information. There is currently no legislation about such claims, simply official guidelines. This is what some of the more common ones should mean. 

• Low fat – no more than 3g fat per 100g of food
• Reduced fat, sugar or sodium – 25 per cent less fat/sugar/sodium than in a standard version of the food
• High fibre – at least 6g of fibre per 100g of food.
• % fat free – these claims are discouraged.  If something is ‘90% fat-free’ it is still 10% fat so is not a low fat food.