The Advertising Standards Agency (ASA) has banned the LighterLife ad, which features 'before and after' photos of Denise Welch, after she lost two stone in two months.

Denise has now slammed the decision, accusing the ASA of preventing people 'dying from cancer, heart disease and diabetes' from finding a 'solution' to their weight problems.

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She wrote furiously: "Weight loss companies are trying to help people, and yet they aren't even allowed to tell us what they can do for us.

"And LighterLife has been prevented from using my weight loss before and after photos as the ASA says I lost weight too quickly.

"How can that be right, when the Foodpacks comply with all the nutritional rules, including Trading Standards, and I did exactly what I was supposed to do with them?"

She added: "I felt better than I had for ages, and those are genuine before and after pictures.

"Meanwhile obesity is increasing, people are dying from cancer, heart disease and diabetes and yet a brilliant solution is being kept from us."

LighterLife medical director Dr Matt Capehorn also criticised the ASA's decision.

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He said: "This shows just why Britain is in its current mess, with one of the biggest obesity problems on the planet.

"There is something wrong when weight loss companies are trying to help dieters, and bureaucracy gets in the way."