Foresight report, available on this site. There is also the recently published Scottish report Preventing Overweight and Obesity in Scotland - A Route Map Towards Healthy Weight also on this site.
The newer reports I have come across are the not so snappily titled, Prevention of Obesity in Europe – Consortium for the prevention of obesity through effective nutrition and physical activity actions report, Tackling the social and economic determinants of nutrition and physical activity for the prevention of obesity across Europe. Again its a useful report and has great background and research reading for those who are interested. My favourite find is the quite wonderful, F as in Fat: How obesity policies are failing in America . Again great report, unfortunately a rather sobering and depressing read. I would like to see obesity policies from around the world so if you come across one, could you please send me a link!
Now for some blatant advertising. My old lecturer has updated one of her publications. Its called the Psychology of Physical Activity: Determinants, Well-Being and Interventions its a great reference or text book. I used it as an undergrad for four years and it was useful for virtually every essay I wrote.
Trust for America's Health (2009). F as in Fat: How obesity policies are failing in America, 1-108
Obesity in Scotland - An epidemiological briefing (2007)