My initial response is to have nothing whatever to do with Openretch or Fucking BT because neither gives the tiniest damn about their customers, and BT actively does what it can to alienate them and provide the worst possible service. However, if Openreach have indeed laid fibre network in the area, then you have no choice as to provider if you want fibre, because they refuse to release the fibre network to other providers. I thought this was illegal, but it seems OFCOM are so incompetent that they only insisted they release their wired network, and fibres aren't wires, are they?
We had no choice, so I am indeed a customer of BT, and in case you hadn't picked up the ever so subtle hint, I hate them with a vengeance. Not only total failure to stick to a succession of appointments over a 6 week period, but no concern whatever as to the situation this left us in (snowed in, no phone or internet, no mobile signal, in a remote location and needing to order food for delivery as soon as the snow was cleared), and persistent blatant lying. This included the statement that as they paid for the fibre network they didn't have to release it, which isn't true as it was financed by the Welsh Government and the EU, because OR and BT had failed to provide the network as directed. Their guaranteed price for 18 months was a lie too, as it went up after 6 months.
So, unless you really need fibre, steer well clear of BT! When they eventually connected mine, they said "look, its fast, its fibre" to which my response was that it was half the speed of Virgin's basic service I had in my previous home, which was installed on time, a few days after asking. The router's wifi is crap, too, but they want me to pay more, just to get the service they should be providing in the first place, i.e. wifi that works.