PH-03Check for cables and pipes, and set up your safety netScan the exact fixing point with a cable and pipe detector, but remember detectors can miss cables that are deep, run in metal conduit, or sit outside the normal safe zones — so still treat the ceiling as if something could be there. Before you drill, find your stopcock (usually under the kitchen sink) and check it turns freely, so you can shut off the water fast if you hit a pipe. If you have any doubt at all about what's behind the ceiling, isolate the lighting circuit at the consumer unit first.