Lemain;
"Who certified the amount 400kg of fuel? How, and when?"
That would have been found in the tech log, usually filled in by the duty pilot immediately after the last refuel. I don't know how the Scottish ac tech log is printed, but NPAS tech logs have boxes for, landing qty, litres in, kgs in & post refuel/next start qty.
Are you for real? Given your identity is no secret and employers these days search Internet forums and online social media, this kind of sarky arrogance is not going to do your career a lot of good but that's your business. Politeness, respect, tolerance,...team-work,....?
Nothing to do with sarky arrogance, just the post you made, I think, was quite funny
Sorry all, I was thinking of the 'unavailable fuel' side of the discussion
Fuel starvation - Wikipedia, the free encyclopedia 