100% so true ...Tell NICEIC that the contractor was using their logo and they will be up in court in double quick time. Tell ANY of the schemes about iffy workmanship and they will really not have much to say.
It isn't even in their remit to police anything.
Trading standards ? Possibly IF you could get a bored inspector who might know a regulation or 2 about electrical installations. But even in this case and it IS bad, What was the outcome? What damage was done? What "law" would they get dragged to court based upon?
Building control? They will just go after the householder for employing someone to do work in a notifiable location and for failing to notify.
It's not an offence to be a pretend electrician nor is it an offence to be rubbish at it...