Alan,
Don't know if you have had your treatment if so I hope all went well and you recover well. But I was diagnosed in September 2015 at the age of 58 after a routine blood test for kidney function, I had no symptoms.
Results of my biopsy were 70% positive of 10 samples, 5 in left/ 2 in right were positive. PSA 13, Gleeson 7 (3+4), originally reported Stage 4, but after a second MRI this was changed to Stage 3A locally advanced PC.
After my urologist suggested that I look at alternatives to RP surgery if I wanted any quality of life, I went hunting for other solutions after being offered EBRT + HT as my only real choice as I was too advanced for any other treatment.
Spoke to a senior consultant at the BHOC in Bristol and asked my doctor to refer me to there. They responded very quickly with an offer for my wife and I to visit Southmead Hospital for a consultation. There were a number of men and couples there and when our turn came we had a consultation with a surgeon, then a radiographer and finally the brachytherapy surgeon, quickly realising they were all senior consultants who all gave us their expert opinion. Afterwards I confirmed my desire to pursue the brachy route and they confirmed they would consider me. A few days later I had confirmation by letter that they would accept me for treatment, 6 months HT, HDR brachytherapy then 23 doses of EBRT. Started HT Jan 3rd 2016 and treatments were all completed by June 2016.
It has taken over 2.5 years for my PSA to reach 0.1, but it did at my Feb 2019 review, I am now hoping it stabilises down there. ED problems occurred at 4 months post treatment but slowly improved over the next 12 months with the help of 100mg Viagra/sildenaphil. Now this problem is almost non-existent, though occasional use of 50mg sildenaphil comes in handy. I was getting very tired but again this has almost entirely disappeared.
I can't speak highly enough of the consultants and hospital at the BHOC in Bristol, and after being given a pretty grim original prognosis I can say there is always hope, just keep looking forward, never back and consider all your options not just what you are initially told.