I neglected to mention that my room was equipped with a good-sized desk fan with three speed settings. That was a pleasant surprise, because I always travel with a small battery-operated fan when I'm in London. This time I never even took it out of my luggage. I don't know if all rooms are similarly equipped, but I'm sure the hotel staff would accommodate you.
Can the room windows be opened in the event it gets stuffy? For ventilation. we are planning for a December visit. thanks in advance!