‘Supersizing’ has been blamed for America’s obesity epidemic. But now the habit has come to Britain.

A poll by weight loss specialists found 70% of Britons are tempted to upsize meals, particularly if doing so only costs a few pence. The problem is not a lack of awareness. Almost 80% of people surveyed, recognised that plate sizes had increased in the UK over the past decade.

Maggie Cassidy, a psychotherapist, said: “The research highlights how cheap food, a lack of awareness of appropriate portion sizes and junk food promotions are tempting British people to over-eat.”

More than 80% of the 2,000 people questioned confessed to eating even after they had become full. Over half admitted to feeding themselves and their children large portions.

Professor Iain Bloom, an expert on obesity, said: “Obesity continues to be a significant issue for many individuals and is set to cost the NHS significant amounts of money.” Obesity costs the NHS around £3 billion annually.

Professor Bloom continued: "In extreme situations, by choosing the wrong foods in the wrong quantities it can lead to a dramatic reduction in life expectancy.” This year officials announced that obesity is increasingly being listed as the cause of death on death certificates. Obesity-related deaths often occur from heart attacks, strokes and some cancers.

Foods that are high in saturated fat, salt and sugar are singled out by doctors as being particularly bad for people. Diets that feature large quantities of vegetables and fruits are strongly recommended.

The recommended calorie intake for an average man is 2,500, while for women, it is 2,000. Some food products are so fatty, they give you a large portion of your recommended intake in a single meal. In the US, the restaurant chain Friendly’s has introduced a burger that contains 1,500 calories. The burger features two toasted cheese sandwiches, in place of two buns.