Thanks for the responses. I never thought decorating could be so difficult My respect goes out to all of you.
To answer some of your questions:
Aarus, no, the paper was clean and nothing bled through. As you say, poor paint (or too thick, plasticky paint), and rolling it to far. And again...
Thanks Dec. Good advise - I'm sure I was doing it all too quickly. Not sure how the missus will take to losing her new colour. But it might be the only solution. Once again, many thanks.
Thanks TheDec.
Attached image - doesn't look quite so bad in real life.
Forgot to say that I've tried to work over the patches with a pad - but just made things worse.
Dear gurus,
I started with Wickes 1000 lining paper (walls full of hairline cracks), and this went without a hitch. I even used filler in the gaps to give a 'professional' finish (very short-lived!)
Then the nightmare started.
I used a medium pile Wickes roller (cheap as chips type with tray)...