NB "Quercus"
Everything has its day, and the sun has set on the shower room on narrowboat "Quercus"!!
A bit of stripping out didnt reveal too many problems, I've reinforced the floor under where the old bath was to support a new shower tray.
Cladding the small cubicle on top of a 1200mm x 700mm stone resin shower tray makes the new facilities seem cavernous, and removes the slip hazard of the old hip bath installation.