Really hacks me off, it is usually the plumbers that muck my wires up!
It is everyone with mine plasterers, plumbers, tilers, tackers and chippys. And gas fitters, I chased out a brick wall above a c/u last week to fit a metal 2 by 4 trunking in to carry all the wires from the cu to the rest of the house, only took me 3 hours of hacking. I came back the following week to find the gas guy had installed his effing pipe in my chase. Luckily I carry a 25mm pipe splice.
Martin