In a previous bathroom I got a tiler in but this one I had a bit more time and did another small tile projects practice behind me.
Today though I realise I've made a bit of a balls up with the vertical setting out in the niche. I realise that there would be a slither at the bottom of the niche so there's a couple options
1. Keep the slither at the bottom
2. Do what Ive done as indicate and run it full height in the niche (loses the grout line)
3. Fill out around 20+mm and bring "up" the niche so the bottom is flush with the tile
Not sure if it's worth doing option 3.
Here's the example one I have upstairs, think I may manage to get my mitres a bit tighter than previous.