Went to a job today to fit new sw spur for cooker hood extract and supply eic cert for the ring I worked on. While I was there a guy was stood in the kitchen marking out the walls for sockets . The lady told me he was a local odd job man who is also tiling the wall . She said our company were to expensive to do the lot so he will do the rest . They only wanted me to do the extract and provide a cert which then allows our Fitters to plug in the appliances.I asked the guy if he had part p and he said he never heard of it. I then told the customer who couldn't care less. While the cowboy was just about to spur off the socket 3 times I told him to leave all the work until I've finished testing. What more can you do ?