Now I'm certain the soil pipe wasn't visible. There was a big thick pipe going into the floor because I remeber a bit of a gap around it when the carpet was in there years ago ( yes hideous carpet in bathroom I know). There was definitely no pipe going from the toilet horizontally to the sink/ bath .
I suppose the soil pipe must be below floor level otherwise I would see it at the back in the gap between the bath and the vanity unit wouldn't i ?
I suppose the soil pipe must be below floor level otherwise I would see it at the back in the gap between the bath and the vanity unit wouldn't i ?