I'm a very amateur DIYer. Wonder if you can help me with a small electrical issue. I'm updating a cupboard and want to make safe a live electrical cable that is longer in use (see picture). I'd like to cut it so it sits inside the wall, which I can then cover with ply, and paint. But I don't think this is the correct thing to do. It's quite an old property, and I can't trace the route of the cable without ripping the house apart.
Any ideas what I should do?
Thanks in advance