Hi Max,
Sorry you join this club.
As Dave said, I had HT plus external beam RT plus HDR brachytherapy boost at Mount Vernon, 15 months ago now. Very pleased with the results so far, but obviously, it's too soon to be out of the woods yet.
This treatment seems to be a good combination of best outcomes for high risk patients, with not particularly bad risk of side effects. My short term side effects were all gone by 10 months (and mostly much sooner). I have one late onset side effect, rectal bleeding, but it's painless and minor, and no impact on quality of life whatsoever.
Very happy to talk if you wish.
I also run the Mount Vernon Prostate Cancer Support Group.