Could it happen?
Liam Fox appears to be moving into a comfortable 3rd place (though in these contests, with a secret ballot, MPs are often lying) with a non-formal endorsement from a right-wing grouping I've never heard of it.That will mean David, David and Liam will go into the next round, where presumably the right-wing vote could go to Fox if David's campaign is considered irrevocably punctured. That would leave the party members voting on David or Liam, and though the membership aren't as right-wing as you would believe, they do like a bit of Europe bashing and Cameron only does that to a degree.
So Fox it is! Years of fun ahead.