Fast-food chains could be told to cut the size of portions of chips, the chairman of the NHS watchdog has said. Sir Michael Rawlins told the Daily Mail the National Institute of Health and Clinical Excellence (Nice) may produce guidelines to recommend smaller servings to help combat obesity. One restaurant has cut the size of its chip portions without customers complaining, he added. Rawlins said: “Someone had actually reduced the number of chips in a standard portion. Nobody noticed, which is quite interesting. Nice could suggest it. It could be a recommendation. When it comes to obesity we have to do more to help people reduce their intake of food. It is not a single bullet but a whole variety of things that we need to do to help people and help communities.” He also warned that some chip shops are accidentally making harmful trans-fats – blamed for high cholesterol in the blood, clogged arteries and heart attacks – when they reheat cooking oil.