The sparky said that the actual certificates that are given to the customer and to register with the authorities, so that they can give the notification of work carried out cost is £3000 so he has not registered for that. and will be calling another guy to do the testing, give me a cert and notify my local authority and that guy has payed that £3000 and is able to put his name to the work and give me the cert and notify my local authority.
I think there has been some bull excrement offered in your direction!
Your local council, charge £406 for electrical work that is done via an electrician that is not a member of a "COMPETENT PERSONS SCHEME" (such as ELECSA, NICICE, NAPIT) If they are a member, the notifications costs, in my case would be £1.50.
So where £3k is calculated from I do not know!