As I posted earlier, the Flight Planning and Performance Manual.
Ahh yeah I didn't see that. Ta. I wonder if it is the same as our "Performance and Limitations Manual" as we don't have a 'flight planning and performance manual'.
I have no recollection of it being in ours or of hearing it mentioned so it may be specific to your company or companies that elect to have it included as per local regulator rules. Interesting info and good to have in the back of my mind, thanks.