How do I bathroom / kitchen / extension? etc.

I only have this pic from when it was just finished. Fitting was pretty straightforward, albeit a bit nerve-racking as it's big. Dot and dab with mirror adhesive and as it sits flush with the face of the tiles it sat on the top of the tiles which stopped it slipping off the wall. I then fitted a couple of battens vertically to hold it flat while the adhesive went off. It's the second time I've fitted a mirror in tiles this way.