That bloody woman!
Openreach also came in for implied criticism. "Without infrastructure competition, the existing provider has poor incentives to build new fibre networks, as this undermines its existing copper based services."
Back in the 1980s when BT was a world leader in fibre technology, Maggie Thatcher slapped a 10-year ban on BT delivering TV & video services in the hope that it would allow a break-up of its monopoly and encourage other telcos to step in. There was no internet then so video was the only reason to lay fibre in the "local loop". BT, with its massive network of underground cable ducts was still ripping out old lead-covered aluminium cables left o'er from t'war.
Wind the clock forward and all those cable TV companies that sprang up (and dug up all the streets) have now gone to the wall or become part of the monopoly that is Virgin Media.