Duchess of Cornwall biography a possibility

Britain's Duchess of Cornwall may be the focus of a new book by biographer Andrew Morton.

The former journalist - who has previously written books about Princess Diana and Monica Lewinsky - is considering writing a book about Camilla, who is married to Prince Charles, because he is not interested in writing about royal men.

He said: "Books on royal men don't sell - books on royal women do."

Future queen Kate Middleton was recently said to have turned to Camilla for marriage advice ahead of her wedding to Prince William.

The pair were spotted lunching at the Berkley Hotel in Knightsbridge, London, with Camilla's daughter Laura Lopez and Kate's sister Pippa and overheard by a fellow diner talking about "giving advice".

The source said: "The four women were talking away like mad and none of the waiters could get a word in edgeways to serve their lunch.

"I heard Camilla saying, 'If I can give you one bit of advice...'

"Kate was really enjoying the moment. There was one moment which was clearly meant to be amusing when Kate said, 'What happens if William doesn't turn up?

"They followed that with talk of menus. I heard chipolatas, sausages on sticks and mini pizzas, but I don't know whether it was ironic or not."