Keep checking the checker every day to see when it's available, though.
Just register your interest (in full fibre) on the BT / Openreach checker website.
They will send you an e-mail.
I registered my interest, when dozens of Openreach vans started appearing all over town and specialist cable ducting contractors started digging up major road junctions (and along most of the main roads in & out of town).
Within a month or so; the e-mail arrived. I ordered the same evening and full fibre was installed, to my home, within a couple of weeks (it could have been earlier, but I didn't trust the new Smart Hub would arrive in time).
I ordered online (bt.com - signing into my account).
I was still within contract; but BT don't care about that (they just start you off on a new 24 month contract).
As it turns out, because I managed to get a decent discount last time (which was around 6 months away from ending); the transition to full fibre actually worked out cheaper than if I'd have started a new 24 month contract for FTTC (i,e, ended my current discount).
In the end; I think it was something like £6 more per month (and a straight FTTC renewal was showing up as being more expensive!).
Ade
FTTP Halo 3 with BT
DL 300Mbps
UL 50Mbps