School programmes encouraging children to take more exercise and eat healthily are unlikely to have any real effect on childhood obesity, a study in the British Medical Journal suggests.
More than 600 primary school pupils in the West Midlands took part in a 12-month anti-obesity programme.
But the study found no improvements in the children's diet or activity levels.
Public health officials said they were working with industry to make food healthier.
They also said a sugar reduction programme and the government's sugar tax would help…