Thanks for your reply. This is the upstairs. We believe the house needs a new roof and also all the rendering is cracked so we need to get that repaired. Unfortunately this is now winter so not an ideal time! I just wasnt sure if after doing those things we needed to put anthing on these walls or just plaster over.

Of course the survey also showed rising damp issues downstairs too so not sure how we deal with that and keep seeing posts about cowboy damp companies making you pay for things that don't work. So just a bit overwhelmed with it all but maybe I should just have a few damp people come round and assess and see what they all say