Yep, I was referring to the paper face of the plasterboard. I'm just gutted that I have to redo everything again now, as I spent a lot of time and effort in putting up new plasterboard, fitting in the shower tray, tanking it, all done myself... just for this guy to mess it up completely. Should have just attempted to tile it myself instead!
Here's a photo of it prior to him tiling it.
Here's a photo of it prior to him tiling it.