Hello clever people Hope you can help. We have our consumer box in our downstairs toilet, right in the top corner. I want to put up a small shelf above the sink, a mirror and a toilet roll holder on the same wall, but I'm worried about wires when drilling holes. I do have one of those live wire detectors, but it's temperamental (or I don't use it properly, probably). Would there anywhere I could safely drill on this wall? Hopefully I've attached a picture. Thanks in advance for any advice.