Wet Room Renovation, what order do you carry this in please.

After a full rip out, First fix your plumbing and electrics.. This may cause more damage, reinstate the damage after testing it. Now, install your tray, and connect plumbing and test. Board your walls and ceiling if your doing this with whatever boards you're using. Tank the shower area to specification. Self level your floor if required. Skim your ceiling and any walls not being tiled. Batton your walls as low as possible after working out your cuts for your tiles. Tile the walls above the batton to the ceiling including cuts. Tile your floor, take off batton and tile the remaining cut on the wall which joins to the floor. Attach second fix plumbing and test, now all the drilling is done you can grout the walls. Fix your fittings and shower screen etc paint ceiling sna walls if plastered. Grout your floor, clean the bathroom then silicone.

After stripping walls and floors I would cement walls to make as level as possible . Once that is done I would grind out of walls channels fir your 1st fix plumbing and electrical work . Put in waste on floor . Once all these are done and plumbing is tested I would level floor and use concrete hardback boards on the floor . Before fitting shower tray I would tank around the bottom corners of floor where it meets wall along shower tray area ( best tanking Mapai bath/shower tanking kit) then fit shower tray and tile walls and floors . Once tiling is complete including grouting 2nd fix plumbing .