"Plus the £22.5bn raised from 3G auctions that wouldn't have happened had we had a single state owned operator. And the many billions gained from the sale of BT. And the corporation tax from its profits."
The money "raised" from the 3G auctions though - who do you think paid for it (and the effort required to run the sale)? You - the consumer. All you've done is be taxed in a massively inefficient way, allowing a portion of that to be carved off to private equity funds.
As for the corporation tax on its profits - you realise that we'd still have that plus the actual profits?
It's like the people who were very excited to purchase shares in the Royal Mail's IPO and get very excited that they now own part of it. They always owned it, but are somehow pleased to be able to pay for something they already owned.
I'm not a complete communist though, I'm well aware that the broadband market we have now has driven faster speeds and that BT would probably still be doing 512Kbps broadband if it weren't for LLU and competition, but let's not get excited about us going back to single companies and expecting that we'll benefit from it.