So, people, thank you for that!
Just two weeks after the CPAP trial (UK) I now get a full 8 hours sleep a night, I feel awake for the first time in years ( and worse, I never realised how bad I'd got). I used to wake every 2 hours thinking I just needed to urinate - that was never the case!
CPAP has, in two weeks, woken me up, realigned my brain and returned me to humanity!
If CPAP were a religion I think I'd be a convert! Sure, it's a pain wearing a mask every night, the soreness (only slight) around the points of contact and general nuisance of the system but all worth it.
Your comments (on other posts) have helped me to understand the condition and, over time will help to manage it so, thanks very much!