The marriage of Queen Elizabeth II to the Duke of Edinburgh is the longest of a reigning monarch in British History. What began as a fairytale romance has matured into a union lasting more than 60 years. It has survived the public scrutiny and private misfortune, providing continuity for both their family and the nation during a period of unprecedented change in British history. But how did they meet, what brought them together and to what do they owe their martial success. Features exclusive, recently conducted interviews with Ingrid Seward, Countess Mountbatten of Burma, Sarah Bradford, Dickie Arbiter, Hugo Vickers, Lady Glenconner, Andrew Pierce and Romilly Weeks.