I have seen a few cases where the buyers valuation for mortgage purposes has had the comments put on "Electrical Installation gives cause for concern". And as a result i have done a few PIR's for sellers, and quotes to do whatever is required, the buyer and seller can then thrash out a deal based on the cost of remedial works or whatever is needed. It is down to the discretion of the surveyor what he comments on or not. And like most other things they are probably covering their bums so it doesn't come back and bite them.
My son had a valuation on the house he bought a few years ago,
1, electrics give cause for concern.
2, damp proofing needs checking.
3, an in depth inspection of the roof is advised.
The electrics were fine, i replaced his consumer unit just to bring things up to spec.
The damp problem wasn't a problem, a broken fall pipe had been left too long and the water seeped through the stone into the bedroom wall.
The roof was knackered though and he got ÂŁ5k off the asking price to get a new one fitted.
So these surveyors whilst they can be eagle eyed, will almost always cover their bums.
Cheers...........Howard