I know we've spoken about the implications about the BHP-Rio Iron Ore merger before & how it would make tactical sense for both to open up their rail to selected third parties as a "quid pro quo" to regulators....It may get to the point where it makes sense for BHP & Rio to actively market the idea of third party rail to appease the ACCC & Chinese Steel mills.
So many factors lay in the balance at the moment re: rail. It's like a game of chess, in this case, sacrificing a pawn (third party rail) to gain another queen!