I don't know if you are mocking me, but that is exactly the sort of arrangement I would propose. Maybe there's good reasons why this could not work (I am no expert on the rail system) but no-one has yet explained to me why not. British Airways and other airlines all seem to be able to manage to run out of Heathrow and no-one suggests either that Heathrow should own all the airlines or that BA should. And guess what, we have CHOICE and proper competition.
Not the bollocks we have at the moment where the train company has you over a barrel and the regulator lets them increase fares above inflation every single year.