Neighbour's extension..

[20questions]

Hoping someone can advise and forgive me if silly question!
I live in a semi detached house. New neighbours (not yet moved in) are having large extension done. I have my own separate party wall surveyor who obviously took lots of photos. However ndn is having a new roof. I am concerned about any careless damage done to my roof if they stand on my roof for easy access/not respecting my roof etc (although they will obviously have scaffolding). My PWS didn't take photos of the roof - should I insist he does? To make me even more nervous, I will be away the week it is being done.
Am I worrying for nothing?

Don't sweat it. The photos are for their benefit, not yours.

The builders will not stand on your roof for access lol try and calm down

Why is their roof even attached to your roof? I'm.in a semi doing an extension - none of my extension touches their building

Id guess they are having the roof of the existing house done at the same time as the extension roof.

@Diyextension Yes they are having the whole house re-roofed - the extension is separate and not attached to my side. The main roof is being re-tiled with different tiles to mine - mine are clay theirs will be concrete so wondering about the joining in the middle as I've heard some horror stories (sometimes Google is not your friend lol). I will speak to them but waiting for a call back from my PWS as apparently this should be covered in the act.