Well, how long does it take, therefore, for a school to move from an improvement category, in terms of special measures, to be escalated then? Because one sees sometimes that there's an excellent school, and within five years' time, it's in the red. So, there's a great deal of variance in that.
Well, that would be something quite unusual—to move from excellent to red.
Yes, well, gradually, perhaps.
Yes. Perhaps Claire can respond to this.