Unfortunately, as seems to be common these days, the certificate isn't that helpful in explaining some of the C2s. They've used the default observations that Tysoft inserts, and not added any useful information that would tell either another electrician or a landlord what the actual problem is.
A picture of the board might help clear some of them up.
There's a lot to pick apart in the report - but an initial sweep is already flagging up some issues with it - not necessarily in the sense of someone trying to get extra work (as happens sometimes), but more in the inexperience of completing a useful EICR.
I'm sure others will have plenty of views - but a quick list from my initial sweep:
If it's a terraced house, then Down Lights not being fire rated would not be a C2 imo - if it was a flat with a separate living accomodation above then probably, but not when it's a terraced house.
On the schedule 4.8 he states that "test button does not trip RCD" - but the test schedule does have it ticked, and the C2 seems to be for the RCD not tripping when testing trip times. It's entirely possible it's a faulty RCD, if it was a cheap brand that was put in - but it's also possible that he hasn't tested further (directly at the RCD).
If the 'single insulated' cables showing on spot lights are up in the ceiling (ie not accessible without removing the spotlight), then I consider that a C3 (albeit crap that should be fixed) - though if they are visible then it is a C2 .
I have no ideal what 'light fittings outside have entries' is, but perhaps he means they are no longer IP rated due to holes? Hard to confirm whether that's a C2 or not without a picture.
It looks like he did one universal Insulation Resistance test, since the figures are the same for all circuits. That's not necessarily an issue, but it doesn't really help give a feel for whether any circuits are particularly old or failing.
Based on just the above, I'd say that it would be hard to know from this report truly how bad the property is - so I'd certainly be cautious of any quote for remedial work.
Having said that, there may well be things that need fixing, just that they may not need to be expensive or major.
Has he quoted for remedial work yet?
Did you get an Electrical Installation Certificate for the Consumer Unit install 4 years ago? If so, it would be interesting to compare the inspection schedule against this one to see whether the lighting circuit issue is because it's pre 60s wiring, or there's just a loose wire somewhere....