Well done for your Good grading pecka!
As I understand it, OFSTED will inspect more often if there are any concerns about your practice that might need checking, and they will certainly visit more often if you've had a complaint made (no - I do not speak from personal experience!!)
I wonder whether getting a few hours notice and the horrendous panic and stress for those few hours would be better than having a week's notice?? I've been making notes of all the things that I think I ought to have in place just in case The Phone Call happens to me that quickly.