AB-03Check for cables and pipes before you drillCables and pipes can run almost anywhere in a wall, not just in the usual safe zones, and cheap detectors can miss cables that are deep, in metal conduit, or behind old wire lath backing. Sweep the whole fixing area with a detector, then still treat the wall as if something is there until you prove otherwise. Find your stopcock now, usually under the kitchen sink, and check it turns freely, so you can shut the water off fast if you hit a pipe. If you have any doubt, isolate the relevant circuit at the consumer unit before drilling, and turn off the water at the stopcock before cutting into anything that could carry it.
RULESKNOW THE RULES
Not a legal requirement here, but Part P of the Building Regulations covers notifiable electrical work in kitchens - if you damage a cable and need to repair or alter the wiring, that work may need to be notified or done by a qualified electrician.