Bigspark17 - I disagree, you test all installations to the latest standard (621.2) and yes if changes have been made for safety reasons they are imposed on client whether their installation was correct to when it was installed or not, isn't that how safety updates etc work. My car was fine when it left the factory, more testing & research after I purchased it discover a problem so they recall it to update/fix the problem. A simple example is a domestic install with a 10mm main earth. Fine a few years ago then they discover (I won't go in to details) that it's not big enough and that it needs to be no less than 16mm. On an EICR it's recommended (ESC guide) that this is given a C2.
I don't know how big a safety issue they see plastic consumer units as being a fire risk and am awaiting to see what advice they give on how to code it. I'm keeping an eye out to see when they update the ESC guide.
thanks