I found this in a Google search today and it is new to me.
https://www.rns-pdf.londonstockexchange.com/rns/2287A_2-2011-1-27.pdf
This Wardell report was part of the first ipo, I think.
While it gives a lot of info and details and Burrkins exploration details, here are 2 points that I have noticed at this time:
A)
The price of gold used was $ 900/oz
B)
"
relatively high internal rate of return at nominal input parameters" --- see page 84
I am saving this PDF file to compare with future stuff.