>>65 Positive ID.

She was busty but he very evidently had no desire to look down her cleavage.

I once was presented to the Queen (true story!) and among my little group was one lady who thought that HMQ actually cared about her phd. She spoke without drawing breath about rock formations in Bogota (or whatever it was) for two or three agonising minutes while the Queen shunted uneasily from one sensible shoe to the other. Eventually the rock person paused for a millisecond and the Queen said desperately "Well!" At this point her equerry bodily dragged her away.

Anyway, HMQ's expression was just like TH's expression in this photo.