Loose wire - bullet dodged.

[Nickfromwales]

4 hours ago, Nickfromwales said:

At this point, in the overall M&E scheme, the CU had now already been fully wired, by the (fully qualified) "parachute" electrician and absolutely NOT by the professional, and he had done a neat and wonderful job of it. All good sparkies are OCD freaks, and wiring fuse boards is something you need to leave them alone to do, by themselves, with a supply of tissues.

And here is the exact pic(s)….more available…..