I would be very interested in seeing what the orders ,if any,for disclosure of evidence was in Bell snd in particular the extent to which this report or the material referred to in it could or would have been included in it
Judicial Review is special in that it just has a "duty of candour" which essentially means that the parties are required to put all relevant information and facts before the court. The parties are expected to honour this rather than there being any specific order for disclosure.
As mentioned above, it looks like some kind of summary of the evidence was put before the court (see paras 25 and 73), but I am surprised that GIDS didn't just give the court the draft report, even if it was still going through peer review. And you all know what it means when lawyers and judges say we find something "surprising".