Most consumers don't blame supermarkets and manufacturers for rising obesity - but nor do they trust them for health advice, according to research.

In a survey of 2,400 people by consumer research body the Henley Centre, 91% believed the individual was responsible for regulating their weight.

Only 21% thought supermarkets were to blame for rising obesity while 39% said manufacturers bore responsibility. Nearly half - 46% - blamed advertising for making people fat.

When it came to who consumers trusted most to dispense accurate and unbiased advice on healthy eating, the internet and friends ranked highest, followed by independent retailers, suppliers and - at the bottom - supermarkets.

When asked whose job it was to sort out the growing problem of childhood obesity, 84% of respondents said parents should play a role, 53% thought the government should get involved, and 42% said manufacturers had a part to play.

Consumers were more concerned about weight management than any other health problem, including high cholesterol and blood pressure. Most respondents said they were trying to eat more healthily.

But Henley Centre director Tamar Kasriel warned: "According to other data, people make food trade-offs, perhaps having something healthy for lunch so they can have ice cream for dessert."