Our company's fuel policy is to carry alternate fuel + fixed reserve on all occasions, or 60 minutes at the primary destination, whichever is the greater. As a consequence of operating to a great number of destinations with nearby alternates, the 60 minutes at the destination usually rules. This means typical "Chocks On" fuel in the vicinity of 7 to 8 Tonnes.
I'm comfortable with that.
Regards,
Old Smokey