Selgas
Way to resolve the whole dang tooting problem is to install single lever faucets that mix the water both hot and cold – that way it don’t matter which way round ya have the pipes at rough out stage!!!!!!!!!!!!!
The lever goes left for hot and right for cold, but ya can easilty change the indicator disc to whatever side you choose.
Life has to be easy sometimes.
And Robert would ya like to comment how come the tap locations were the same before both World Wars?? 
Selgas Services Ltd
Craftsman Gasfitters, Plumbers, Electrical Service Technicians
