EICR report C2 on front pannel (security of fixing)?

Hi, 

I have done an EICR recently. I got C2 for "4.2 security of fixing (134.1.1.)"
Which I felt is bit unfair. They are trying to charge me £750 + VAT to fix the issue (repace with new consumer unit).

I felt they are trying to put me in a panic mode and upsale to me.
Could I get a second opinion on if the item is code worthly?
The consumer unit is located in storage cupboard. 

I would appreciate if you could provide an extract of the related section on the regulation, to provide justification.

  

missing screw"incorrect screw"

  • If you carry out repairs such as this ('modifications'), can you vouch that they are no less safe than the original product?

    That's a very fair point. I do not see how it can be. When the screws are tight and the cover is closed, all is well, but if the cover is opened, will the nut stay in place, and can it be used again?

    If I were going to make a repair for a customer, and charge a reasonable hourly rate, it may not be cost effective.

    So when a Back Box Saver is used, where does potential liability lie? With the electrician, or with its manufacturer?

    There is a role for make do and mend, but legislation may get in the way. What a pity!