Tiling on plastered cork tiles?

[StephenStephen]

We discovered that the wall we plan to tile for a shower is topcoat plaster onto cork tiles onto lime plaster onto laths. It's pretty wonky.

What should we do?

Thanks for your thoughts, Stephen

 

[flameport]

Remove the whole lot and fit cement boards.

 

[StephenStephen]

Remove the whole lot and fit cement boards.

Thank you, long screwed to the laths or batten first?