Re: Im confuzzled
One option would be for all existing mobile networks to be forcibly merged into a single national network, and every provider (Vodafone, EE, etc) becomes a virtual network on top (like Tesco, GiffGaff are OTT providers on someone else's network). That would give you "operator agnosticism" simply by making it so that there is only one physical network, really.
4G simply cannot provide excellent coverage, especially inside buildings, without a high density of base stations. Physics. The signals have to reflect and diffract through small openings within buildings having already been attenuated. You need long wavelengths, high power and low data rates. 4G uses short wavelengths, low power and high data rates.
I am not sure why the Government ever thought this was a good idea. Maybe they should have had a word with an RF engineer first.