.... a bit of the wall wanted to come with it! Was using a steamer at the
time and the plaster behind the paper bubbled right out. Held it against
the wall until it cooled down and dried a bit. Now it's completely dry,
it's still in one piece, but cracked a bit and definitely not sound (it
pushes back a couple of mm).

What are my options now? Can you knock sections out and put a "chunk" of
plaster back in? Should I ignore it, fill the fine cracks with Pollyfilla
and paper over it? I'm not sure what's behind it - would it be the skimmed
plaster and plasterboard be behind or could it just be thin plasterboard?
It's a 1930's house if that's relevant.




a