Any clever plumbers out there? Is there any regulation, or is there any convention, that determines which side of the basin/bath/sink a hot water tap is fixed? It makes sense to me, as a non-plumber, that hot should be be universally sited only in one position, which would not only help the poorly or non-sighted, but cut down on the number of scaldings that accidently occur. If there isn't a regulation or convention, then I can't believe the authorities have been so negligent in not thinking this one out. It just makes so much sense!!