Champs
GS = BTRDA® Gold Star Championship    
SS = BTRDA® Silver Star Championship    
1400 = BTRDA® 1400 Rally Championship    
P = BTRDA® Production Cup    
H = BTRDA® Historic Cup    
RF = BTRDA® RALLY FIRST Championship    
R2 = BTRDA® Rallye R2 Cup    
ST = Fiesta ST Trophy    
E = MAXXIS MSA English Championship    
W = Pirelli MSA Welsh Forest Rally Championship    
NWF = ANWCC Forest Stage Championship    
FMP = FMP Rally Challenge 2018    
SSS = Shining Stars Rally Series    

Class
RF1.4 = BTRDA® Rally First cars up to and including 1400cc    
RF1.6 = BTRDA® Rally First cars over 1400cc up to and including 1600cc    
RF2.0 = BTRDA® Rally First cars over 1400cc up to and including 2000cc    
1400S = All other cars up to and including 1400cc.    
1400C = Cars up to 1400cc with:- (a) 8 valve engines (b) Engines with more than 8 valves that retain the standard fuel and inlet manifold systems (c) Engines up to 1000cc not eligible for the BTRDA Rally First Class RF 1.4 (d) Current and former FIA Group N1 cars    
N3 = Current and former FIAGroup N cars over 1400cc up to and including 2000cc    
NR4 = Current and former FIA Group N cars over 2000c    
B10/R2 = Over 1400cc up to and including 1600cc, including all FIA R2B cars    
B11 = Over 1600cc up to and including 2000cc    
B12 = Over 2000cc two wheel drive    
B13 = Over 2000cc four wheel drive cars that do not qualify for Classes NR4 or B14, and FIA R4 cars    
B14 = Current and former World Rally cars with a sequential gearbox, plus current and former S2000 and FIA R5 cars and any derivatives there from    
H1/2 = All Historic Category 1 and 2 cars and Category 3 cars with single cam engines    
H3 = Historic Category 3 cars with multi cam engines over 1600cc plus Category 4a cars and Category 4b cars up to 1600cc    
H4 = Historic Category 4b cars over 1600cc which comply with R49.1.5