From their very first meeting over tea at Buckingham Palace, the Queen approved of Meghan Markle. Not only did she like her, she had high hopes for what the American actress might be able to achieve with Harry for the youth of the Commonwealth. Soon the country as a whole seemed to take to Meghan with equally genuine delight. One of the few wary of succumbing to her charm offensive, however, was Prince Philip. While the Queen continued to champion Harry’s new love, he warned his wife to be cautious. It was uncanny, he told her, how much Meghan reminded...