Without knowing your infrastructure layout, it's hard to give a definite answer .... but there are two types of underground feed to premises ....
1) Direct in Ground (DiG) cable, this cable has a steel wire armour wrapped around it for protection and back in the 60's and 70's they tended to use this stuff on the then new houses being erected. The cable was basically led on the ground and the streets and houses built on top of it.
2) Ducted feeds, the feed of choice for the last 30yrs or so .... basically a hollow tube connecting up the infrastructure from underground box to underground box and finally to the outside of the premises.
If your copper feed is No.1, then the surveyor will have probably quite rightly used civils/cost reduction techniques and opted for what are called 'Carrier Poles' to get the fibre cables overhead from point A to point B.
The mandatory Reg 5 notice will have been sent into the Council for their approval, and also a statement of intent affixed at the site of any new poles to be erected, giving residents 28 days notice to complain.
If the residents do not want the poles, then the high likelihood is that the build would be shelved for now as 'high cost', and picked up at a later date with a higher-funded FTTP programme.