B
The cowboys have been getting away with it for years and will always get away with it until someone gets plated or dies because of them.
Why do you think 'Part P' was introduced? Look it up.
Unless electricity is treated the same as gas then the whole sham is a failure.
'Part P' is here because a member of parliments daughter was unfortunate enough to get electricuted.
It was also to provide the HMRC with a traceable work history so that they can nail you for the cash jobs