While fixing the extractor hood yesterday, I accidently hit a wire when drilling and exposed the copper. The wires are too tight to get some kind of a box in there and putting an electrical tape may be too fiddley.
Any advice will be greatly appreciated even if you believe hiring a tradesman is a better option.
See the pictures attached:
Edit: after repair by the pro:
Best Answer
A DIY repair may be possible, though ugly, even if the wires are trapped so you cannot pull through any extra length or a replacement length of cable. Attach a 1-gang box to the wall in exactly the right place so you can cut the cable and bend the ends upwards into that box from below on opposite sides. Join Live to Live, Neutral to Neutral and Earth to Earth using screw connectors and short pieces of wire to bridge the gap. The bridging wire must be the same gauge as the cable ... easiest source is a bit of offcut cable, probably 2.5mm, and the screw connectors must be rated for 30A if that's a ring main. Put an informative label inside the lid to help anybody wondering what the heck it is, and screw the lid on. You now have an accessible junction box as required by the rules, that looks like an old socket box that's been blanked off.
THe lesson for the future is to invest in a buried cable detector device, and to always use it before drilling holes in walls. These detectors aren't expensive., compared to calling out an electrician....