This may or may not be of help to anyone, but combining details mentioned in the handbook regarding points at races, I've produced a simple webpage that aims to roughly calculate points (for the results and classes that allow it) or times depending on a result. I had no idea how complex the procedure was, and must say hats off to those who have to calculate them!
The main reason for creating it was at races wanting to gauge a rough estimate of points before results are posted online (as sometimes not being shown at events at the end of the day).
The site is just a tool and not official by any means - and nor do I guarantee its accuracy!
Click me for the calculator
Cheers
Matt