Mobile phone reality
Two ironies strike me there. First, we've effectively consolidated from 5 networks to 2 already, with T-Mobile and Orange forming EE, then EE combining operations with Three to form MBNL and O2 and Vodafone pooled masts under Cornerstone. (Which is one flaw in Cameron's new-found love of roaming: if you're miles from the nearest O2 mast, you'll be exactly the same distance from the nearest Vodafone mast too, so roaming to them would be futile. There might be an EE/Three mast - but a dual-SIM phone and a Three PAYG SIM will get you access to that right now, without any roaming hassles.)
Secondly, it was the government which benefited enormously from the competition, particularly for 3G licences, pocketing many billions from it! Would they have managed to extract that much profit from their own state mobile company, or would it all have been wasted in militant unions and inefficient operations?