You CAN keep an airport open by alternating brushing of BOTH runways, which is what seems to happen at other airports including LHR.
Even after the recent cockups nobody seems to be learning, instead MAN switches to single runway ops and then calls a closure.
If I was an airline CEO I would be wanting heads to roll.
MAN pull your finger out of your a*se and get this continuing fiasco sorted.
I and the world no longer want to listen to excuses.
You have had 36 hours notice of this snow, every bit of equipment should have began rolling as soon as it started.