To mark this year"s Platinum Jubilee, BBC Studios have made a 75-minute documentary, narrated by the Queen herself and featuring never-before-seen footage from private home movies shot by the Royal Family. Elizabeth: The Unseen Queen includes images of the then Princess Elizabeth showing off an engagement ring before her betrothal to Prince Philip was made public, as a young mother with Prince Charles and Princess Anne, and spending time with her uncle, Prince George the Duke of Kent. Yet of the more than 400 reels of film the BBC was given access to, none postdate her coronation.