Well that would be a very different result as there would have to be a coalition. Maybe even a labour, lib dem and green coalition in power.
That triumvirate of self interests wouldn't have lasted a year. There's a misconception by some election bad losers (not NSCers, obviously), that all politicians who aren't Tories have so much in common. Labour would not want to give the Greens any credence that they are anything but a fringe party.