Thanks for replying Chris.
I had radiotherapy in Jan. 2018
I was on Goserelin for 2 years together with Aberaterone - and treatment stopped in July ( in fact that's when I would have been due the next depot injection ).
I have been keeping things going with a pump regularly - and use Sildenafil and sometimes Vitaros when my wife and I have sex. I'm lucky in that I get an erection - but the desire and sex drive is just not there.
I know from what I have been told it will take months to return but I wondered what others had experienced with regard to length of time.