Obesity is a complex public health issue that is a growing threat to children’s health, as well as a current and future drain on National Health Service (NHS) resources. The Wanless Report stated that public health – the promotion of good health and the prevention of disease – should be central to the work of the NHS. Obesity already costs the NHS directly around £1 billion a year and the UK economy a further £2.3 to £2.6 billion in indirect costs. If this present trend continues, by 2010 the annual cost to the economy could be £3.6 billion a year.