[user104658]

Originally Posted by jet

Unless the Queens, Prince Philips and Prince Charles's official biographers are all outed as outrageous liars I'll take it they know better than me that it was his special name for her, used affectionatley only by him since the death of her father and Margaret.

Can you give me a reference on that? Which biographies? Which authors? On what pages?

Because to be frank - you back up an awful lot of your points with the evidence that "a royal source said it" or "a royal biographer wrote about it" but you never actually say where. We're just supposed to accept that they did... because you say so. It's not really evidence, is it... you could say literally whatever you want followed by "one of the biographers wrote it just trust me" .