It looks like around the bay window, bottom l.h.s. ‘used’ to leak, (need to check it isn’t an ongoing leak?)
And near the top rh.s. There is a gap which may need that some gib repair.
Skim coat the walls to paint standard. Painting maybe required but ultimately need expertise and certified to inspect the bay window and gib fix first. Prefer a 1 stop shop.
Looking for a professional job.