But the largest ISPs (except for BT Retail) have chosen not sell FTTP services for some reason. Even with the likes of PlusNet, you would need to be a customer before upgrading to FTTP.
There are very limited ISP options for people in FTTP areas. Even with some of the smaller ISPs, it is not clear on their sites whether they sell it or not and their checkers have not been updated to reflect that FTTP is an available option.
BT Retail is the only ISP (that I am aware of), that actually tells an enduser that they can receive FTTP from their online checker and gives them a list of possible speed variants.
Even the likes of AAISP have totally outdated information on their site for FTTP. If you look at
http://aaisp.net.uk/broadband-FP.html , you will see they are still advertising speed variants withdrawn by Openreach a couple of months ago.