I would say most of us are guided by the electrical safety council best practice guide 4 issue 5, which makes it clear that an old wyles fuss box with a TN supply does not attract a C2.
Electricity in the home is protential dangerous, so rather a silly code, what we look for in general is two things must go wrong to get a shock. The class II is the exception, only one thing has to go wrong with class II as it is considered as double insulated.
But if some thing is protentialy safe, it is protentialy safe and it does not matter when installed, there was a code 4 which was does not comply with current edition, however this was removed, wrongly in my view as the owner needs to know what up grades will be required before he can have additions.
C3 can however list all not given a C2 or C1 so it all can be still listed. There does seem to be a problem working out what is the remit of some one doing an EICR to me it does not include any appliance, that is a seprate inspection, so missing cutout on immersion may be dangerous but not part of the EICR same with too many items plugged into a scoket.
However many places I have worked the PATesting was only done on items plugged in, and the guy doing the EICR did items like hand dries, this made it easier jobs being split by equipment needed to test rather than if technically EICR or inspection and testing of in service electrical equipment (PAT testing).
The same applies for fire inspection, emergency door access, lights over emergency door, smoke alarms, and the rest, often done by the electrician but not his normal job.
So until the law required an EICR the electrician often included items which were really beyond his remit. Can't really blaim him for doing what he has always done.
