Hi, sorry for bringing this up, but Thorpe wouldn't have had a relationship with Tatchell or Proctor. Neither were his type. Whilst not to say that he couldn't have gone for them, it's unlikely he would have, as he was mainly interested in having sex with young men beneath his social status who he could wind tightly around his finger. Luke may be an option but I don't know anything about him, but Tatchell and Proctor weren't really his type. They would have also been too young during the period he was really active, and by the time he would have met them, they wouldn't have been the kind of people he had sex with. I also doubt they'd be interested in doing it in public.
An interesting PoD involving Thorpe and Norman Scott, though, is what had Scott decided to not tell his friend about his intention to kill Thorpe and commit suicide in December '62, and went through with it?