The Call for Evidence is now on the school website - in the same inaccessible spot as the terms of reference.
Home page -> Information for Parents -> School Policies and other Information -> Call for Evidence by Lord Carlile QC
Let me make it easier for you. It is here.
It has the same form of words as the advert in the Gazette, with the
same 28 day time limit, but the document is undated, so you can't tell when the 28 days started.
You couldn't make it up!