Oh, a friend of mine proposed that she was Mrs Peel after Casino Royale, on the basis of the exchange between Bond and M: "I thought 'M' was a randomly assigned letter. I had no idea it stood for..." "Utter one more syllable..." Her point being that "one more syllable" implied that [E]M was a syllable rather than a letter.

[Sorry, you must be wondering why I'm responding to this two years later, but I caught up with Skyfall at last on television this week, so was finally able to come and read this review!]