But she can hardly have been surprised when the 90-year-old decided to pass comment as he spotted her eye-catching bright red number during a Diamond Jubilee visit to Bromley in Kent.
With a twinkle in his eye, he turned to a police officer who was also being presented to him and said: "I would get arrested if I unzipped that dress!"
Asked about the Duke's comment, she said: "I'm not sure really what to say," and directed inquiries to council press officers.
...he asked a pensioner who was wrapped in a foil blanket: "Are they going to put you in the oven next?"
Barbara Dubery, 89, had been given the foil wrap by council officials who were worried she would get cold as she waited in a wheelchair.
Her daughter Pam Shaw said: "It made her day."
The current icon shows Polistra using a Personal Equation Machine.