Adding a Socket AFTER nice Decorating has been done

How do you add Electrical wiring once the house has been decorated?
Usually the answer is “with great difficulty!” As you should really do wiring first.
But if you’ve just moved home and it’s nicely decorated, then you find it needs a rewire (or just a new socket or two). Then this shows you one such method to avoid ruining the nicer decor.
Just one of many alternatives.
But as mentioned already ... It’s always easier to do wiring BEFORE plastering or decorating.