DC's school got RI last year, this was the first time they have ever not had good. It's had regular inspections as it's an independent Special School.
Now Ofsted are back in again. When DC was in the local mainstream, the school swung between RI and Inadequate (over a period of 10+ years) but there was years between full inspections (obviously had interim visits etc).
I feel really quite concerned what the reason could be? It is definitely a full inspection - letter and parent view questionnaire etc.