Roy, having read your biog, I'm puzzled that you ever stopped the hormone treatment. Through all my various treatments over nearly eleven years, I've always been on Zoladex. Your PCa looks to have been pretty aggressive. Was there never a biopsy? There are treatment options available to you, I'd have thought, as there have been to me. If yours is a highly differentiated cancer, the latest, yet to be cleared by NICE, Keytruda, might be of interest, too. Your oncologist is best placed to advise, of course, but your PSA number is still low and you should certainly not despair.
Good luck
AC