Trafalgar Day with the unveiling of King George VI Statue at The Mall (in september 2009 - nearly 54 years later - The Queen unveiled in front of the statue of her father, a statue for her mother, the unforgotten Queen Elizabeth The Queen Mother).
Later in the video (2:50), one sees a bejewelled Queen Elizabeth II for the dinner in the Royal Naval College in Greenwich. HM wears the GGBNI tiara and (and that's the reason why I post it here) the Brazilian aquamarine necklace in its original setting.
To complete (though off topic, please forgive me), the video of the unveiling of The Queen Mother's statue in 2009: