Well the way things are going then they may possibly be about the only one left (unless some foreign/outsider comes in at the last minute).
Vodafone were in the running, then appeared to pull out after the books were opened.
Next it was CPW, who stepped down saying that they werent going to pay over the odds for them, or pay more than the company was actually worth.
Ive never seen any mention of BT being interested (OFCOM/Monopolies Commision would probably kick up a fuss and say no)
So I guess that just leaves Murdochs deep pockets.