Further update today. Visited my dad thursday afternoon, and managed to collar an actual Doctor!! 
He told me basically everything I already knew, and confirmed some stuff I strongly suspected; i.e. he won't be receiving any more treatment, and more than likely, won't be getting home. 
now, it's against my nature (usually) to say "never", and the doc didn't either.......but he also told me that contrary to what they thought before, they now know he has:- lung primary with bony metastases (not just "long" bones, but also pelvis and spine so far) PLUS, a stomach primary with liver mets. They originally thought the liver tumour was secondary to the lung ones, but they are no relation!
So, I learn all that..... he says to me,
"I know what I want for my birthday!" (June 13th)
Says I, "Oh, what's that?"
"A Laptop!!"
Special-edition Ferrari logo-ed Acer, thankyou very much!
You've gotta laugh, haven't you? I'll bloody-well see him on here yet!!! 
 
DM