1. Chinn S, Rona RJ. Prevalence and trends in overweight and obesity in three cross-sectional studies of British children, 1974–94. BMJ 2001;322(7277):24– 26.

2. Scottish Intercollegiate Guidelines Network (SIGN). Management of obesity in children and young people. Edinburgh: SIGN, 2003.

3. McCarthy H, Jarrett K, Crawley H. The development of waist circumference percentiles in British children aged 5.0–16.9 y. Eur J Clin Nutr 2001;55(10):902– 907.

4. McCarthy HD, Ellis SM, Cole TJ. Central overweight and obesity in British  youth aged 11–16 years: cross-sectional surveys of waist circumference. BMJ 2003;326(7390):624.

5. Parliamentary Office of Science and Technology (Postnote). Childhood  obesity. London, 2003.

6. British Heart Foundation. Couch kids, the growing epidemic: looking at physical activity in children in the UK [booklet], May 2000.

7. Campbell K, Waters E, O'Meara S et al. Interventions for preventing obesity in children. Cochrane Database Syst Rev 2001(1):CD001871.

8. Barlow SE, Dietz WH. Obesity Evaluation and Treatment: Expert Committee Recommendations. Pediatrics 1998;102(3):e29.