My London update:
Othello: set up a date, but he canceled the day before, saying he had come down with something. Responsive and professional in his texts. Will try again next time.
gamboa25cm: friendly guy but disappointing experience. Massive endowment that never got fully hard, even though he used an ED med and multiple cockrings. Foreskin doesn't retract (phimosis), I should have noticed his "bell end" is never visible in pics. Would not repeat.
KevinLondon: quick response, easy to set up a date, handsome and looks exactly like his pics. Dick is huge and rock hard the whole time. He's a pounder, which is great if you're into that. I prefer a more sensual pace so I probably wouldn't repeat, but I still recommend him.