Why do some people never seem to get fat?

"The UK is a country obsessed by the threat of obesity. As the average person's weight has grown, so has coverage of the subject. The chief medical officer for England, Sir Liam Donaldson, has said we are facing an "obesity timebomb". Culinary celebrities like Jamie Oliver have launched campaigns, in homes and school kitchens, to fight the fat war. Yet the science of weight gain is less straightforward than the headlines sometimes suggest. Why, for example, do some people seem to eat what they like and not put on weight, while others limit their diet yet struggle to shed their bulk?" - BBC

Chemists to provide obesity pill

The obesity pill, orlistat, has been licensed to be sold over-the-counter at chemists in the EU. The pill, which works by blocking the absorption of fat in the body, will be available at a lower dose than doctors generally prescribe. It is aimed at adults with a Body Mass Index (BMI) of 28 or more. One expert said it may help some people with weight loss but they would have to take a conscious decision to eat less fatty foods - BBC

National Obesity Surgery Centre (UK)

National Obesity Surgery Centre (UK) - Performs weight loss surgery, including stomach balloons and gastric bands