The fact that BT isn't activating every cab is not an error, they haven't the money to please everyone... the fact they aren't FTTPing the whole country isn't an error, it's economics. The fact they aren't hiring thousands of people so that roll-out could be done in less than 5 years, isn't an error, it is economics...
VM is simply to point out that the same case applies, but in a far more potent way... the companies that rolled out cable to the most of the UK went bankrupt.
As for the final third, Fujitsu's recent statements on the sums not adding up should show how even the white knights have had to revise their promises based on cost realities.
Anyone who really truly needs a connection will get one, such as the B4RN project. The B4RN briefs freely admit that BT nor any other ISP could do the FTTP project for them as they envisage on a commercial basis. But, they because they NEED it have got the funds together and made the effort. And event their costings are high, pro rata ~£20B for full national FTTP.
But the final answer is BT, nor any other ISP, are under any form of obligation what so ever to provide you, or anyone else for that matter, with a fast broadband connection.
Where they are is because they think they can make money.
If they are required to please tell us where the regulation or government document is?
LIfe isn't fair and there is little justice in the this world, pity the lives we lead if there was... we'd be deserving everything that happens to us!