The blame for obesity should not just be laid at the door of the fast-food industry: research from Bristol University has found lack of sleep can cause people to crave more fattening foods. It says sleep deprivation leads to hormonal changes that stimulate a craving for fattening foods. But the researchers state the obvious when they say tired people are less willing to take the exercise needed to burn off the flab. The Financial Times leader column is somewhat cynical about the research sand points out that shedding weight is more likely to be achieved by eating less and exercising more rather than slipping back between the sheets. Financial Times