When I first bought my house and had builders in to do work to satisfy the mortgage lender.
I
stupidly used the cheapest quote for the builders to do the wall rebuilds and wall ties. There was not one tie fitted to any of the walls. I was aware that their guarantee wouldn't be worth the paper it was written on but I figured that they would actually put ties in given the company were called Damp Proofing and Wall Ties.
Later, when they were doing the damp proofing injections, I was doing a partial rewire of one of the parts of the house I was going to live in for a while. I told the builders the power would be off for a while as I was working on the rewire. I pulled the fuses from the consumer unit and,
stupidly, left them there.
I wondered off to start pulling out old cables from under the floor so I could put in new ones and went to cut through a ring main that I had pulled the fuse for. The resulting explosion took a big chunk out of my side cutters and made me deaf and blind for a moment.
The brain dead builders, on finding that I had indeed turned the power off decided to put the fuses back in and turn it on again!
I fined the builders the cost of a set of quality side cutters and made them bring their own generator, at their own cost, for the remainder of the job. All the fuses for the house were then locked in my car each day while I worked.
Though the mortgage company were happy with the work

I have been re doing all the work myself to do it right. Still need to install wall ties in the front of the house and replace all the bricks they drilled holes into, and shattered, for the damp proofing.