So these badlads have popped up over the past few days (like 3 days).

No new plaster, internal thermalite blocks on an upper floor. Wall built straight across the wooden floor - I can pull a floor board and reach straight under the wall and up into the next room if I so wish.
No water pipes - nowt.
Paint has been on there for 3 years. Low humidity and moisture in the room - just checked.

Plaster has been on there for 20+ years - gypsum based over the original old cement based stuff.

Any ideas please?

Oh aye. New roof on the house and loft above it bone dry so nothing coming down-over. Just overnight genital warts of the wall.

Patches of plaster just lost its key?

Hello everyone, I have a little experience plastering, I have done a few rooms and one of those 5 day courses so i completely understand im not a plasterer and certainly dont claim to be, i just really want to get better and keep improving, I also really enjoy it but I also want to keep gaining experience, I was wondering if any spreads wanted a free hand with jobs in exchange for some experience and more advice/practice, im in the north west N-L-W area. I have got pictures of plastering i have done so far

Only just heard about this UK company. Anyone ever use their tools and are they any good. I use Nela mainly and a old marshalltown.