thanks for posting the picture, haven't seen it afore. It's an ardous job to identify some of the wedding-guests, the seat plan for the wedding reception (page 10 in the file) had been a good help. When I am not quite sure I put a ? behind the name. So let's start ...
Front row (left to right): Nada Marchioness of Milford Haven (?), Princess Alice of Greece, Princess Margaret, Prince William of Glouchester, David Mountbatten Marquess of Milford Haven, Princess now Queen Elizabeth, Prince Philip, Prince Michael of Kent, Princess Alexandra of Kent, King George VI, Queen Elizabeth, Henry Duke of Glouchester, Prince Richard of Glouchester, Alice Duchess of Glouchester, ?, Princesses Helena-Victoria and Marie-Louise.
Second row (left to right): Prince Flemming of Denmark (son of Prince Axel and Princess Margaretha of Denmarik (eldest daughter of Carl and Ingeborg of Sweden), Lady Patricia Ramsey, Edwina Countess Mountbatten, Marina Duchess of Kent, Princess later Queen Juliana of the Netherlands, Queen Fredericia of Greece, Queen Mary, Queen Victoria Eiugenia (Ena) of Spain, Queen Ingrid of Denmark, Crown Princess later Queen Louise of Sweden, Irene of Greece Duchess of Aosta (? or her sister Queen Helen of Romania; both ladies were among the guests), ?.
Top row (left to right): King Peter of Jugoslavia, ? (covered by Edwina's hat), Louis Earl Mountbatten, Hon.-Col. Sir Alexander Ramsey, Prince Bernhard of the Netherlands, King Hakoon of Norway, Prince Regent Charles of Belgium (?), Prince George of Greece, Prince Rene of Bourbon-Parma, King Frederick of Denmark, King Michael of Romania, ?, ?.
It's an ardous job identifying some of the persons for there had been some members of the Danish Royal Family among the guests that are not so well-Known, for example Princess Margaretha of Denmark (who was accompanined by her son Flemming) or Princess Margarethe of Bourbon-Parma, who was accompanied by her husband Prince Rene and her daughter Anne and one or two of her sons).
Also among the guests were member of the Greek Royal Family as Princess Marie (George) of Greece and her daughter Eugenie, Lady Katherine Brandram and her husband, and Queen Alexandra of Jugoslavia.
I also miss Philip's grandmother, Princess Victoria Marchioness of Milford Haven, and his uncle, Crown-Prince later King Gustaf VI. of Sweden, and some members of the British Royal Family, Princess Alice Countess of Athlone and her husband the Earl of Athlone, her daughter Lady May Abel-Smith and the Marquis and Marchioness of Carisbrooke who were among the wedding guests.