Stephen Burrows
Its very straight forward to replace plasterboard. If you are employing a tiler, he can do it. If you are tiling yourself you can buy the boards at a DIY store, but best to get moisture resistant, fix in place with plasterboard screws onto the existing battons. If it has beenoriginally fixed with dob and dab, its easiest to put some new battons in to fix the plasterboard to. No special skills needed, probably a general handyman can do it.