A very appreciative thank you to all of you for your current input.
As a brief update:
The UK Public medicine system does not currently recognise the concept of
Free/Bound PSA or PCA 3 tests.
I think it is possible to get these privately - which I will be exploring - a few hundred sterling pounds - probably.
There is no recognition of colour Doppler Ultrasound in UK - & I am trying to find out whther this exists in Europe - as although I have many friends in USA I was not planning a visit for the forseeable future - but its a possibility.
The MRI was (I believe) the latest all singing & dancing Tesla 3 - but I may get a repeat - if not I may get a private one - around a thousand sterling pounds - I think .
My prostate size was estimated at 75cc. & with a PSA of c. 26 we all thought that there must be something somewhere!
Maybe there is - but its hiding very successfully - we will see - I suspect in due course - hopefully before things get out of hand.
But as we ALL know we can only establish PCa by pathology!
So its still possibly "hunt the needle in the hay stack!"
All further suggestions welcomed.