You gain an F grading through Regionals and at National events F1 and F2 which are valid for the next year. Gradings run from 1st of Jan through to end of Dec.
Example:
Assuming you was a F4 put you drove awesome through your regional events and gained an F2 license in 2015. You will remain a F4 driver till the end of 2015. 1st of Jan, for the full year you will be a F2 grade driver and will be seeded as that through all events.
If in 2016 though you do not do any sanctioned BRCA events, then you will drop a grade to F3.
Hope that was clear enough.
You can see the 2016 licence grades here:
http://www.brca10thoffroad.co.uk/201...icence-grades/
