I have tried to tell people what to do years before Part P ever came in and bitter experience showed me unless I had some power. As with Apprentice. Then they always seemed to think they knew better than me. As a result in the main it takes more time to instruct some one than do the job than do the job ones self. So let them dig the trench but very little else will ever save time so in turn does not save them money.
I am sure some signing for other peoples work does go on. I could see myself signing for my sons work or him signing for mine. But out of family just can't see it happening. Maybe where some one has more work than he can handle he will get a colleague to help him but colleague rather than friend. Some one you have worked with for years and can trust.
We all make mistakes and if a mistake is made then I am sure HSE will not let go if they even got a whisper of wrong person doing the work. And of course insurance would also be invalid.
What would interest me is what happens when some one stops trading. Some of the work I have done for DIY people takes years. And I have left the firm I was working for and moved to another before it was completed. So I can't sign the Installation certificate as not insured once I have left and no one else can sign it either. Old days no one worried but now it's a little different.
Reverse has also happened when I have replaced an electrician and been showed the job they were on when they left. No records and it is left to us to decide how much to check. When you find the last guy was sacked then you do wonder what hidden horrors one may find.
Yet the LABC signed off my work without even a visit once complete so some guys must be very trusting, or lazy?
But in the main I think we all know the guy is not really on holiday and the DIY man has no intention of getting anything tested. With
these there is no reason why the DIY guy should not test his own work but at £45 there are those who would not even spend that to test their work and if they will not pay for the cheapest of tester than they are not going to pay an electrician to test.