Anthony Seldon is Master of Wellington College, having previously been the headmaster of Brighton College. He has written or edited over 30 books, including the standard works on Prime Ministers John Major, Tony Blair and Gordon Brown. He is the authorised historian of 10 Downing Street, and has written extensively on it. He is co-founder of the Institute of Contemporary British History, and Action For Happiness. His next books are the authorised history of the British Embassy in Washington, a new book on 10 Downing Street, and a book on happiness and spirituality. David Walsh is the former Deputy Head of Tonbridge School and has taught in Australia. He is a published historical author. He leads battlefield tours. He lives at Oxted, Surrey.