Alan Johnson sparked a political row over obesity last night by accusing David Cameron of holding “Victorian” views that blamed people for being fat.

The Health Secretary called for a national movement to tackle obesity after complaints that ministers had not done enough to reduce the nation’s growing waistlines.

This month the Conservative leader suggested in Glasgow that the obese should take more responsibility for their lifestyles, attacking the notion that some people were “at risk” of obesity through no fault of their own.

In a speech in London to the Fabian Society, Mr Johnson said that “hectoring and lecturing” the public would not work. “Vilifying the extremely fat does not make people change their behaviour and the healthy eating message has to be delivered more intelligently,” he said. “It’s easy for politicians to stand on the sidelines accusing the impoverished, the fat and the excluded of only having themselves to blame. But before we evoke the Victorian notion of the deserving and undeserving poor . . . we should take a moment to consider how complex these issues really are.”

Instead, parents should be told that children could have their lives cut short by 11 years because of dangerous levels of fat in their arteries or around their organs, he said. Mr Johnson argued that obesity was not just an issue for Government and that everyone, from individuals to big supermarkets, should do all they could to help people to lead healthier lives.

The Health Secretary said that the Government had rejected both the “nanny state” approach and the “neglectful state”, which “wags the finger in the direction of the most vulnerable families in the vague hope that they will do as they are told.”

“The Conservative Party have apparently chosen this approach,” he added.

The Government was criticised last month for slow progress in tackling obesity, as well as alcohol abuse. Despite England having the most obesity among adults in Western Europe, a government strategy on the issue was published only this year, the Healthcare Commission and the Audit Commission noted.

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