CHfour
With all due respect, Sir, if you don't know what TRWs are, then perhaps you shouldn't be flying airplanes, if you do.
As to the extra fuel, there are countless reasons and if you're a pilot then you know what they are. I have never worried about being called into the office on my 'conservative' approach to flying airplanes. I think I know what I'm talking about.....do you?