One of these is that the open inspection area behind the switch box must be enclosed.

I had some plain 2m x 0.9 cement sheeting - so I cut this to size, attached some plastic joiner strips and carefully fastened it in place.

I have used plastic joiner as opposed to plaster flushing so that the sheets can be removed for further electrical work.

I have judiciously removed some of the strip backings so that the panels can be quickly pushed back in to place instead of tightly clipping in as a permanent structure.