HE is the celebrity chef who spearheading high profile campaigns to get the country to eating healthier.

Now Jamie Oliver has completed a new mission after teaming up with a Southampton doctor to cook up one of country's first ever specialist meal for kidney disease patients.

And the city expert who helped him develop the dish says it should set a "benchmark" for restaurant chains and eateries and has urged the whole hospitality industry to follow suit.

Television presenter Jamie - who runs his own restaurant chain - has worked with Southampton General Hospital consultant nephrologist Dr Arvind Nagra and a host of chefs, dietitians and culinary experts to provide a meal option for patients with kidney disease and kidney failure.

Tomorrow people can tuck into the meal when it launches at Jamie's Italian in Portsmouth in an event marking World Kidney Day.

People with kidney or renal disease have difficulty controlling levels of the mineral phosphate - a substance found in a range of foods including beef, pork, cheese, fish, seeds and soya foods.

Phosphate is used to maintain healthy bones and nerve function - with the kidneys controlling how much of the mineral is absorbed and excreted.

But people with kidney disease or failure are unable to remove excess levels of the mineral - which can lead to damage to blood vessels.

Dr Nagra - along with Stephanie Atkins the mother of a child with kidney disease - approached Mr Oliver's head office to ask about provision for phosphate free diets after concerns that patients are not being properly catered for.

Dr Nagra said: "While almost all food outlets cater for nut allergies and provide gluten free choices, none – certainly to my knowledge – offer an option for people with kidney disease.

“It is really important to renal patients they carefully manage their phosphate intake and, at present, their ability to do this is severely limited due to a lack of provision in restaurants.

“We are extremely grateful to Jamie's dietitians and his restaurant team for leading on the development of a low phosphate option as it really will make things easier for many families.

“They have now set the benchmark for other restaurants to follow and, while they may not be able to follow suit immediately, they could take some immediate action by including phosphate levels in meals on their websites and menus.”

Jamie - who launched his restaurant chain in 2008 - has launched prominent national campaigns to improve school meals and tackle obesity and promote the need for better food education through his Jamie Oliver Food Foundation.

Around three million people in the UK are affected by kidney disease, with up to a million undiagnosed.