A late bump, but just thought I'd mention the London escort 'Max Wild'. He doesn't seem to be on any official escorts site, nor has he any Daddysreviews - I found him on one of those Backpage/Craigslist/Doublelist sites. He is suprisingly trusting (!) as a bondage sub. Terrific tall, athletic ripped body, well-spoken (sounds like he attended private school in England), bisexual.
The only reason I haven't revisited is that he was very late for our appointment (otherwise he's great at responding), and his kinks are more "burlesque" (think Venetian masks rather than gasmasks!) which is a slight turn-off for me. But one escort worth getting to know.