Un-plastered.

We've had quite a bit of damp on this wall, for some time. The joints are lime mortar and the newer, modern plaster, isn't breathable (so we've been told).
Out with the hammer and chisel, to have a look what's going on.
It's the oldest wall in the house and many bodges have been done, in it's 100 + years history.
I've got plans A ,B and C in my head and hope that it won't be too big, or expensive a job !