Rowling, the Harry Potter author, has dropped out of the world's exclusive billionaires' club as a result of Britain's high tax regime, the Forbes magazine rich list disclosed on Wednesday. Last year Miss Rowling was estimated by Forbes to be worth $1 billion, with the bulk of her money coming from her books and the Harry Potter film franchise Photo: David Fisher / Rex Features Having been feted as one of the world's richest women in 2011, she saw her fortunes depleted to such an extent that she is no longer a dollar billionaire, meaning she has less than £640 million in the bank. Source: Beattie's Book Blog