It does seem strange that a one man band has to be fully up to speed and assessed yet a big company can just have one person assessed. They should pick at random an employee and assess that person.. I guess the argument is as the QS they should be checking everything but unless they are onsite how can they check inspection?
When I did my 2391 it was interesting how it seemed everyone was pretty much on par when it came to the theory side. But the practical element seemed to catch people out, the two that went in before me, one ran out of time, the other just walked out after 20mins. The guy I did it with just could not find the third fault. I found all faults without even looking for them just by the process of testing and completed it with about an hour left, I would not say that hand it out like confetti and in my experience more than half failed the practical element, although I thought it was pretty basic... More of an issue is you dont actually even require 2391 or to be part of a CPS to do EICR's, maybe start with the low hanging fruit.
The difficulty for people coming into the industry is even the industry cannot decide categorically what code to give some things like no RCD for lighting circuits. I dont think this fine is going to put many off, if the guy was doing 7 EICR's a day at Ā£100 a pop he is still quids in compared to someone charging Ā£200 and only doing 2 a day, even with a fine. Stroma as far as I am aware are for domestic installers, EICR's should be for EAS only with inspection assessment via the CPS.