What you all have to remember is that A level grades fluctuate depending on how badly the rest of the country did. And plus, Cambridge colleges at least don't care that much about the grade. I mean, they care, but if you miss a grade, they'll think very carefully before letting you go because you've already proved how motivated/smart you are. And just forget about them til' August anyway: there's nothing you can do.
Hope to see you all as Freshers next year, and if you're a Cantabrigian, I'll probably see you at the Fresher's Fair!!