Re: @Lee D
BT service was crap because of analogue exchanges - not because of its ownership. BT service became better becasue of digital exchanges - not because of its ownership
The contents of the exchange building, whether crossbar, system X or system Y, had no impact on the availability of underground plant, or of repair times. Digital exchanges certainly improved the network in terms of new features, and simpler (=cheaper) meter reading, but what really improved BT's service was the change of ownership. It could make its own decisions about where to spend its own cash, and didn't have to rely on civil servants to centrally-plan everything.