We have a 100% phone coverage in the UK, the Eastern Bloc is much less well served so they need an expansion of telephone connections and as you say it makes sense these days to do it with fibre. So the basic answer to the question is "because we don't need it" as we are not at the same point in our telecoms network development.
Openreach envisage providing 80% of new developments via fibre without any copper in the future.
Phil
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