You have written a page and still did not answer the questions.
What u should have said was the card is now the new skill card has well has heath and safety. (ECS/CSCS)
The point of having these cards is to prove to anyone who asks that you are certificated if asked and h&s trained.
From the first of January there are compulsory for any trade working on sites.
715 ended too in Apr this year too.
There are new rules for all of this.
Certification for electricians has change too.
Has for people working has electricians “mates” that has end.
There just classed has “labours “, trainees electricians are paid at a higher rate and must be on a training program.
Its takes 4 years to train a trainee on day release, I am surprise you don’t know that.
You don’t need to be an electrician to part “p” its only a 5 day course, myself and most of my staff had to do it a few years ago.
You seem to have a very poor idea of how to run a business and I am surprise you can get insurant.
The world is changing, and you may not have the new paper work or be following the new H & S rules, but I am sure the rest of the electricians are.