first female prime minster has been the subject of several biographies but, until now, no historian had given his or her verdict on the Iron Lady. David Cannadine's new book is therefore itself a historical event, and we are delighted to host this unique discussion between Mrs Thatcher's authorised biographer

first female prime minster has been the subject of several biographies but, until now, no historian had given his or her verdict on the Iron Lady. David Cannadine's new book is therefore itself a historical event, and we are delighted to host this unique discussion between Mrs Thatcher's authorised biographer