I share your pain, there is a fibre line-running past my house also, I have crappy long-line ADSL and live in the country.
They actually dug up my drive to install it.
I asked the Openreach engineers who were wrecking my drive at the time if it was possible to pay for a connection (or whatever) to be added during installation to allow our little community access.
In our case, the reply I got was that the fibre was paid for by a private school a couple of miles further up the road and was not for public use
I wish you better luck than me!
Chunks