Several people have commented on how infrastructure should be in the public ownership, then others say how the UK isn't a shining example of what happens when infrastructure *is* in the public ownership. But the UK infrastructure is actually heading in another direction: Non-profit (or heavily regulated for-profit)
Rail: First, everything was nationalised. Then everything went for-profit private sector. Now, the infrastructure (Rails and some stations) is a government backed non-profit (Railtrack) and the trains are run by for-profit companies.
Phones: Again, everything was nationalised. Then for-profit BT was formed. Then BT was slowly split up, and Openreach (last mile cables) is slowly being pushed towards a non-profit standalone entity.