No, not at all.
That was just me commenting on something that I have seen in the past.
Yes existing installations should inspected and tested to current editions of the Regulations, which is why I queried the suggestion to use a code C2 for a non-compliance with a requirement that ceased to exist in 2008.
I apologise for any confusion or feelings of inferiority caused by my post.
If it were the case that you were being asked to conduct an Initial Verification on an installation designed to an earlier version of the Regulations, then yes you would be expected to conduct your Inspection and Testing to ensure compliance with that earlier version.
If the Local Authority is asking you to Inspect and Test an existing installation to an earlier version, there is no reason from a legal view point why you could not do so.
If I were to conduct such an Inspection, I would be recording the fact that the Inspection has been conducted to the earlier version and that there may be non-compliances with the current version which may render the installation unsafe for continued use.
Good luck with your quest for a definitive answer.