Who is it best to approach about pocket doors?

Ideally a carpenter can do this job, if the wall is a hollow sounding wall it would most likely be a stud wall. This could be taken down partially and rebuilt to take pocket doors.

Good evening and a friendly hello from the glazing doctor team. We have recently completed a project that required some pocket doors installing. My advice would be to use a plasterer as studwork and obviously the skimming afterwards is all part of their day to day work. The pocket doors are really straight forward too assemble and are very similar to using the galvanized studwork that most plasterers are familiar with. I ordered them from a company we use regularly for locking mechanisms called northwest hardware and they have them in many different sizes. I would highly recommend the ones they sell as they are really good quality and when you assemble them they come with braces so they remain perfectly square. Any decent plasterer will be able to complete the installation and will save you money, you won't need multiple tradesmen to get the job done as as plasterer can build the stud and skim it but it's not very common for a carpenter to be able to plaster "too a high standard anyway" I hope this helps 🙂. P.s be sure to check the finished wall thickness including plasterboards