You do indeed practice what you preach Mr B, by not posting the links you mentioned.
The only site I have discovered that covers Valiant BK1 XD864 and the Tench Report is here, but the latter is on an audio file, not a pdf. I post it because the theme of the site is of untoward interference in the BoI in order to situate the report. The quote at the top of the page should ring a few bells.
plus ça change, plus c'est la même chose....
XD864 (blackfish.org.uk)