I think our guy might be being really cautious. He's put a red flag/level 3 for japanese knotweed, despite stating he didn't find any in the garden, just that it's known to be in the area (we are in London!)
The house is more than 100 years old, he's given us a level 3 for some loose/slipped tiles on the roof - surely not a terrible problem to fix?
Also some frost damaged bricks, something to do with the chimney affixed to the roof is letting in a little bit of water. Again all red flags/level 3.
To me this doesn't seem like a massive problem. I've booked a phone call to go over it with him on the phone. I'd love to hear some other stories though - what did yours throw up and did you decide it was acceptable?