The OFSTED inspector will (probably / almost certainly) tell the Head straight away about the overall grade (Grade 1 Outstanding, Grade 2 Good, Grade 3 Satisfactory, Grade 4 Inadequate). After that, the Head will probably not make a public announcement until the Staff and Governors are formally told, (probably in a staff meeting). Then, probably, a letter will go out to pupils / parents (all interested parties) within a day or so announcing the result. You may then obtain the full report from the school.
If there is a longer delay I would be guessing the school is disputing some of the report's findings. The report will eventually appear on the OFSTED web site after about six weeks.
Idle reading:-
There was a shepherd looking after his sheep on the side of a deserted country road. Suddenly, a brand new bright red Porsche 911 appears and screeches to a halt beside him. The driver, a woman wearing a Chanel suit, Ray Bans and a Cartier watch, steps out and asks the shepherd, If I can guess how many sheep you have can I keep one?
The shepherd looks at the large flock and says, Okay.
The woman connects a laptop to a mobile phone fax, enters the NASA website, scans the field using GPS, opens a database linked to 60 Excel files with logarithms and pivot tables then prints out a 150
page report on a high tech mini printer. She studies the report and says to the shepherd, You have exactly 1,586 sheep.
The shepherd replies, that?s correct. You can have the pick of my flock.
The woman packs away her equipment, looks at the flock and puts an animal in the boot of her Porsche.
As she is about to leave, the shepherd says, If I can guess your profession, will you return the animal to me?
The woman thinks for a moment and then agrees.
The shepherd says, You?re an OFSTED inspector.
Correct, responds the woman, but how did you know?
The shepherd replies, Simple. First you come without being invited.
Second, you wasted a lot of time telling me something I already knew.
Third, you don't understand anything about the work I do but interfere anyway.
Now, can I have my dog back?
What's the difference between an OFSTED inspector and a haddock?
One is wet and slippery, and the other's a fish.
What's the difference between an OFSTED inspector and a terrorist?
You can negotiate with a terrorist.
What's the difference between an OFSTED inspector and a paranoid schizophrenic?
The schizophrenic only thinks everyone hates them.
Etc. ect. etc