I am thinking about doing the job properly and using marine ply instead of plain old plasterboard or water resistant plasterboard. Is this what you would do or should I be doing something else? What about alternate products instead of tiling?
The other thing is that when I stripped everthing out I noticed that on the other side of the wall there is a plug socket. the back of the metal back box is visible. Where the shower was leaking was very near it. Is there any regulations on this? should there be some plastic covering it? should I or can I cover it with plastic to make it more safe. Can I build a cover around it? After I fix the shower the likelyhood of water ever reaching the socket is going to be very minimal but while I have access to it I might as well make it right. What can you suggest?