Re: Hall of shame....
GRR - yes lots of water; but in the 2nd room, where the build up ( for no good reason) was 25 - 35 mm there was generally an inch of water. Stank. All over the floor area - the only thing that was a success up to point was the tanking, which kept the water ingressing into the timber base, walls etc. However damp rot was setting in already in places though - so dry rot soon to follow.
Rob - yes thats WEDI; the design co specified certain things, just didnt check the 'tilers' credentials, so all the work not to any standard. They didnt tape the Wedi seams however.