Bathroom advice

[Robertr6500]

Hi I've just moved into new house which is 7 years old and the bathroom needs updating it has painted walls which I think is just magnolia Matt emulsion which has peeled badly above the shower which I've scrapped off back to plaster so I now plan to tile have way and paint the top half and would appreciate advice on preparing the wall for this thanks for any replies

 

[PrenticeBoyofDerry]

I would recommend where the shower is to tile at least above the shower rose/head.
Preparation for tiling would be to remove all flaky loose paint. I would then sand down areas to be tiled so a key can be formed, the walls will then require priming, then you can set out for tiling.
Flaky paint in bathroom/shower rooms can be a tell tail sign of condensation issues, so maybe worth investigating that!