Can you print the report, redact personally identifiable information (including the report number at the top of each page - this includes the membership no.) using a marker pen, photograph it and upload it? Or digitally copy it and redact it?
Without more information it's hard to establish whether there is any basis for the observations and even with the report it may be difficult.
The item about the RCD being incorrectly wired for example... if it's a split load board then it's very hard to wire them incorrectly. If it's a main switch, it's hard to wire them incorrectly.
With regards to the main earth being undersized... there are a number of factors at work here... if it's say 6mm and there are no signs of thermal damage I would be inclined to code it as a C3. If RCDs are present, I'd definitely code it C3 as the RCDs should prevent any sizeable earth fault current being maintained for a significant period of time.
Whilst not quite the same, I would apply the same logic to the bonding, for the same reasons.
That being said, these are just comments off the top of my head and without the full report (and the experience of seeing the installation) it's hard to provide better feedback.