BSMA Race numbers and background colours for all classes;

Riding Numbers must be of correct size and clearly displayed
on the correct colour backgrounds as per BSMA Rule
book.
Autos: Black numerals on White background
Juniors: White numerals on a Black background
Inter 85 group: White numerals on a Red background
Inter Open group: White numerals on a British Racing Green background
Senior group: White numerals on a Dark Blue
Background
AMX Class: White numerals on a Black background
Open Class: Black numerals on a Yellow
background.