Hi, Am in the process of finalising purchase of a new build house but have discovered an issue with the electrics in the upstairs bathroom. The bathroom light and extractor will only work when the next door bedroom light is switched on. The bathroom has its own light switch outside the door but this does not work unless the bedroom light is also turned on. Someone has suggested that this could be caused by cables twisted around each other and that it's not anything to worry about in the short term. Developer's foreman will be sorting this out. Is it a major issue and is there any safety concern until the problem is fixed? Could there be any other cause apart from crossed wires? I would appreciate any feedback. Thanks