Obese Londoners Forced To Work Out Or Lose Benefits Al Jazeera: Overweight people in one of Britain's wealthiest boroughs could soon face financial penalties. Westminster plans to have doctors prescribe exercise to overweight residents. If people refuse to workout, the local council will cut their benefits. The move is part of a mission by Westminster to tackle the country's growing problem with obesity. Currently, about 25 percent of adults in the UK are considered obese. That number will jump to over 50 percent of adults by 2050.