The EU has given €9.6 million to fund a trial of Broadband over Power Line (BPL).
This technology pollutes the radio spectrum as has been shown by numerous trials. It emits radiation across the HF spectrum, disabling communications in that part of the spectrum and potentially causing interference across the world. HF is not only used by Radio Amateurs (my particular angle on this) but also by the military, international broadcasters, ships and provides long range emergency communication in disaster areas.
This technology is pushed by energy companies seeking to extract more money out of their infrastructure (as is their right) but they form powerful lobbies, lobbying for an unneeded, polluting technology. If they want to develop it, they can do so without state subsidy and stop interference (or buy the rights to the spectrum they wish to pollute - but that’s not possible).