It's Oxford! The point being made is that you can do what she did and still work your way back to the level of success you were primed to potentially achieve. But she doesn't lose anything. There's no years spent grinding out lower level classes and experiences locally in hopes that she will one day get back to where she was, she gets into Oxford University. Perhaps I'm wrong, but isn't the perception of Oxford in England like the equivalent of how people in the States perceive Ivy League colleges? Compare that to the perception of community colleges in the States. One is common and open, the other is prestigious and exclusive. I'm under the impression that Oxford is considered the latter. One would imagine the demands to get into such a school are incredibly rigorous, yet in the film we see Mulligan drop everything and still get into Oxford. Hell, I should have applied there if I knew they were that willing to accept people.