I've said this before but worth saying again - we aren't getting fatter:
Whilst child obesity is a major concern for parents, the rate of child obesity has not inexorably risen. According to the Health and Social Care Information Centre, amongst boys between the ages of 2 and 15, the proportion classed as obese increased from 11.1% in 1995 to 19.4% in 2004, but then ebbed to 17.1% in 2011. 12.2% of girls in the same group were obese in 1995; this rate peaked in 2005 at 18.8%, but steadily decreased to 14.8% in 2010.
Whatever it is that we're doing already appears to be working. Perhaps we should just carry on as we are - without more bans, controls and other finger-wagging from New Puritans?