No. And no.
What would be the rationale for closing down every institution which happened to fall outside the top 30 of whichever dubiously-formulated ranking table someone decides to use? And would the cut off be next year's table publications, the current ones, etc? Poor old Sussex, for example, #21 on the Complete University Guide 2013, but it drops to 31st on this year's table and is ruthlessly swatted out of existence by Eddie the Inane Elitist. I realise that had I gone to Oxbridge or an elite London university, I would have been able to come up with a more convincing and witty name, perhaps with stronger alliterative qualities. So sorry about that.
Of course, once we had the top 30 settled into their monopoly for 10 years, we'd have to close everyone outside the top 10 to ensure that standards were being maintained.