Health campaigners accused Boris Johnson of ‘playing politics’ with children's health after the department of health said it plans to defer the bans on multi-buy deals for junk food and pre-watershed TV advertising for a year. Officials will assess the impact on household finances as families struggle with the increasing cost of living. Curbs on junk food placement in stores will still go ahead in October. Public health minister Maggie Throup insisted the Government remains committed to tackling the issue of childhood obesity. Prof Graham MacGregor, a cardiologist who is chairman of Action on Sugar, said the delays contradicted the ‘levelling up’ agenda.