Sorry to burst into the staff room without knocking!
I'm told it's 48 hours.
Two of my DCs, at the same school, are adamant OFSTED inspectors are coming tomorrow, and they've known since last Friday. (7yo DD is very concerned about her teacher who is so worried, she apparently couldn't get to sleep until 1am, and has told the class she only had 5 hours sleep - DD wants to take her some of my herbal "night time" tea, bless her)
I thought schools only had 48 hours notice.
And what can I do to support the school/staff, if they are having an inspection?