Concerned house-owner, also concerned. It’s ok though, it’s Mrs.C’s Uncle, we just pay his mortgage.
That’s the least of our worries.
See that there? Thats an oven cable used for a plug socket (branched) and then a light switch built on top of a LIVE old light switch.
A quardruple layer of tiles bonded to each other cause the collapse of any remaining plaster.
It’s fun to learn when it’s not your money/life on the line.