Ouch!

Not exactly straightforward planning. When you tell someone to plaster over "this way" and not "a bit this and that way"......
..... Luckily I "only" skimmed both earth & live wires whilst drilling a hole and not completely severing the cable all over. Despite the freshly plastered wall, it wasn't as bad I first thought. It'll just take tad longer to polish up and a less like polishing a turd.