Oh my God, someone has opened the can of worms again.
The original bright "idea" by the NCC was to make all Approved Workshops undergo expensive "training" on LV and ELV systems.
For those who hate linitials being used it stands for 230v and 12v systems.
The idea then was to inform all owners that they "HAD to have an Electrical Safety Certificate " (at the owners cost and having his van basically ripped apart by a person who had a massive TWO whole days "training" for each system), before they would be allowed to plug into site bollards.
The only trouble was, and is, is that neither the main clubs (who support the NCC AWS scheme)will ask for these certificates, and neither will any sensible site owner.
The other problem was that the NCC forgot to tell anyone else apart from the workshops about their "Forced Addition" to caravan ownership.
Your original Installation Certificate states that the system "should" be tested at regular intervals after the initial 3 years, but the word "Should" is simply an advisory term, it is NOT a mandatory requirement (if it was made mandatory the the words "WILL" or "Shall" would be used.
The simple facts are that in all the years of caravans, not one single person has been killed as a result of an electric malfunction in a caravan.
The same cannot be said about death from CO poisoning, but the NCC AWS do not want to take this one on and insist that engineers carry out flue gas testing as a matter of routine and room CO testing, but many engineers have taken this on board and do the tests even though they are not rquired by the AWS.
Back to Electrical Testing, take no notice of the scare mongers tryingto extract even more money from you for no good or legal reason.