As he strolls closer and as the lady turns so that he can see her face, recognition dawns immediately for the Doctor.

"Queen Anne." He remembers his manners and how the lady likes to be treated, not to mention that his luck with royalty never lasts for very long, so he makes a short but courteous bow. A quick look around, he doesn't see anyone else that appears to be with her right now.

"No, I suppose... I suppose not. But I am sure that He would no doubt be happier if you had an escort. Why are you out here alone?"