The following outlet looks fairly old to me, it's in mum's (high rise) flat, she's never used it and never will. I want to completely remove it and fill whatever's behind prior to redecoration. In terms of the cables I'll be exposing, is there anything I need to consider prior to filling, or can I essentially just shove them back and if required cut them to ensure the surface can be smoothly filled? Would it be better practice to cover the ends with insulating tape? I'm assuming (maybe wrongly) these outlets were put in years back and perhaps linked to aerials (and a satellite dish?) on the roof? As I say, not used now.