Ask about the local network topology and especially how they route back to GX. And will it be all part of Denham or just some - Higher, Lower, Village, Green, New ...
Well the Openreach surveyor came today (over 30 mins early!).
I was a bit disappointed to discover that he was only there to check the installation location in my house - which seems like the thing that would affect the price the least. He took photos of the inside and outside of my house and I think also a photo of the pole. He wasn't going to check the route from the aggregation node, the ducts or anything like that.
Sadly he said he wasn't from this area and didn't know the details of the work required.
But he did know that the head-end exchange would indeed be Gerrards Cross.
And that he thought that the Fibre Aggregation Node was close to the junction of the A412 and Old Rectory Lane.
And that that if there was a problem like a blocked duct, I wouldn't have to pay for the cost of working round that.
Not sure if there there is any other on-site surveying to be done by someone else. Or if the rest of the survey will be done back at the office, perhaps in a bit more detail than the original quote.