Remember that the EU was "born" with the main objective of creating a "single market" through the standardisation of laws across all member states.
Still, there is some lobby going on in the EU which wants to detach operators from the network, and make the network independent from everybody. NetCo + OpCo != TelCo.
I really hope this last scenario happens. But it's a bit of a utopia.
FWIW MVNO (operators with no physical network and leasing network time) are already very common in the EU.