This is the first of several scenes in the episode where the Queen's pearls become a major focus. Her dresser is fastening them about her neck here as she practices her speech. She's literally putting on the uniform of queenship, because she's there representing her father, and the pearls (as we all know) are a central part of that uniform. And the real three-stranded pearl necklace that this one represents is even more clearly tied to monarchy: it was a gift from the Queen's grandfather, King George V, to mark his silver jubilee in 1935.
But here's the kicker: the medal that Philip jokingly accuses him of stealing -- the one on the left, partially obscured by his shell necklace -- is the Victoria Cross. The Ministry of Defence notes that the VC is awarded for "most conspicuous bravery, or some daring or pre-eminent act of valour or self-sacrifice, or extreme devotion to duty in the presence of the enemy." It's only been awarded 1358 times in British history. Philip most certainly does not have this one, and this man, who proudly wears it as he stands before the representative of the Crown, has clearly done something extraordinary to earn it. The look of disgust when Philip accuses him of stealing it is beyond warranted -- because Philip is assuming that a Kenyan citizen of the Commonwealth could only have stolen this precious medal, not earned it. This series is trying to put together a rather nuanced portrayal of Prince Philip, and this very brief scene is startling in light of that.
(A description of this real-life evening from the Shawcross biography of the Queen Mum: "They had an enjoyable dinner with Princess Margaret; the King was cheerful and his wife was delighted." In The Young Elizabeth, Kate Williams quotes Princess Margaret, who says they had "jolly jokes" that night. No specific mention of show tunes, but these three -- Bertie, Elizabeth, and Margaret -- were party-loving people, after all.)
Look for a bonus recap this week -- our survey of the jewels of Episode Three will appear on Thursday!