Extend the equipotential zone then?! Just goes to show how useless these scam assessors are! Mind, aren't Napit assessors the ones that insist on flying earth leads in sockets? What a bunch of morons!
They are not applying BS7671 to their assessments, they are applying 'club rules'. Your responsibility is to ensure that the installation complies with the former set of rules, that is all! If it complies with the former but doesn't comply with the latter then that is an issue between you and them only, your installation still complies with the regs.
What good is a flying lead?
It is earthed by the pins?
You should never need to remove the faceplate with power on anyway (test from the front etc)