HaHaHa. Good one Alex ! When the CAA on a recent audit asked to see our operational flight plans, the cupboard was bare ! We argued them down to IFR flights only, and agreed to do them in future, but the few I've seen look like a spider has had one too many and crawled across the page. Fuel planning involves looking at the gauge from time to time, and seeing if 3Kg/min will get there. This is all onshore charter, can't speak for the offshore sector which I'm sure is more methodical.
Hope things are good down in Cheddar.