There seems to be a belief that because particular individuals want FTTP the rest of the country does and it's BT's refusal that's blocking it.
Can we go back to this article: http://www.theregister.co.uk/2016/12/22/gov_claws_back_440m_for_rural_broadband/
The clawback occurred because uptake for the existing product was greater than the anticipated 20%. Surely this proved that huge, pent-up demand? Well, AFAICR the unexpectedly large take-up was 30%. That's 70% of those who could have bought the existing product don't want to spend the extra money to do so. It doesn't bode well for any realistic take-up of FTTP at a still higher price. Maybe the real block isn't BT, it's the lack of customer interest beyond the vocal minority. And all the other companies who've failed to step into the alleged breach to take advantage of BT's reluctance seem to think the same.