Thanks stormy/neighbor. As posted previously, our daughter is married to a Brit and has lived in London. Last time I was over there about a year and a half ago, I didn't have much time with the radio, but I seem to remember them off. However, I might be thinking of the world service transmitter on 648. I'm almost positive that's been taken off.
FWIW, what definitely was still on was BBC radio 4 on 720. But that's less than a killowatt.