We're thinking of a reconfiguration of our bedrooms & bathroom. We're hoping to move the bathroom into the centre of the house to create bedroom shapes that are actually usable (whoever installed the bathroom put it into one of the bedrooms so we just have a small c shaped room as a spare) This would mean a completely internal bathroom with no natural light which we are happy with, but don't know how to sort the ventilation and services out. Any ideas/advice greatly appreciated.