The ceiling in my daughter's bathroom (flat in Glasgow) is quite low, making the room a bit claustrophobic. No idea why it was done like this (probably 20 years ago or more). If we raise it, is there a legal minimum loft space that needs to be left? The extractor fan ducting and some electric cables are routed through this space, which is currently about a metre high but, other than that, there doesn't appear to be any particular reason why the space can't be reduced. Grateful for any thoughts.