Thanks for replies. Will be mine yeh but not forever home.
I always thought a tray was just neater less to worry about. The more I think about it though I'm leaning towards floor drain.
I've got to rip existing (25/30mm) screed up in shower side of room anyway. Was previously two rooms and floor not level between them. I've also got to break out some concrete to get a drain in regardless of which option I go with as currently solid floor. I suppose if I go wet room style it means I'm deffo having tiled floor as opposed to vinyl planks etc
If I rescreed at 30mm ish bonded to concrete below am I okay to liquid dpm on top then tile on top of that? No doubt there are adhesives suitable for on top of liquid dpm?