Champs
A = BRC - British Rally Championship    
B = BTRDA Rally Championship    
W = Pirelli MSA Welsh Forest Rally Championship    
N = ANWCC Forest Stage Championship    
I = Independent Paint Supplies Rally Challenge    
G = Glynne Edwards Memorial Championship    

Class
- = NATIONAL A SECTION (BRC)    
BRC1 = Group R5 (VR5) Group R5 cars conforming to the 2020 ISC Appendix J, Art. 261.    
BRC PROD CUP = Group NR4 over 2000cc.    
BRC JUNIOR = R2 (atmospheric over 1390cc and up to 1600cc – VR2B and turbo over 927cc and up to 1067cc – VR2B) Only Ford Fiesta R2 on Pirelli tyres are eligible    
BRC CADET = R2 (atmospheric over 1390cc and up to 1600cc – for all R2 cars homologated before 01/01/2018    
BRC3 = Group A over 1600cc and up to 2000cc Super 1600 R2 (atmo over 1600cc and up to 2000cc – V2RC and turbo over 1067cc and up to 1333cc – VR2C) R3 (atmo / over 1600cc and up to 2000cc – VR3C and turbo over 1067cc and up to 1333cc) R3 (turbo / up to 1620cc) R3 (diesel / up to 2000cc)    
BRC4 = R2 (atmospheric over 1390cc and up to 1600cc – VR2B and turbo over 927cc and up to 1067cc – VR2B) Group A up to 1600cc Kit-car up to 1600cc Group N over 1600cc and up to 2000cc    
BRC5 = Group N up to 1600cc R1 (atmospheric up to 1600cc - VR1A/ VR1B and turbo up to 1067cc - VR1A/ VR1B)    
BRC NATIONAL = Cls 1 2WD non-homolgated cars up to 1450cc; Cls 2 2WD non-homolgated cars 1451-1650cc; Cls 3 FWD non-homolgated cars 1651-2050cc; Cls 4 RWD non-homologated cars 1651-2050cc; Cls 5 all 2WD non-homolgated cars over 2051cc; Cls 6 any 4WD car not in Cls 7; Cls 7 any FIA R5 car out of homologation.    
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--- = NATIONAL B SECTION    
RF1.0 = BTRDA Rally First cars up to and including 1000cc    
RF1.4 = BTRDA Rally First cars over 1000cc up to and including 1400cc    
RF2.0 = BTRDA Rally First cars over 1400cc up to and including 2000cc    
1400C = Cars up to 1400cc with: (a) 8 valve engines, (b) engines with more than 8 valves that retain the standard fuel & inlet systems; (c) engines up to 1000cc not eligible for Class RF1.4. Remote reservoir susp systems not permitted unless standard or homologated.    
1400S = All cars up to and including 1400cc not eligible for Classes 1400C or RF1.4.    
H1/2 = All Historic Category 1 & 2 cars, Category 3 cars with single-cam engines and Category 4a cars up to 1600cc    
H3 = Historic Category 3 cars with multi-cam engines, plus Category 4a cars over 1600cc and Category 4b cars up to 1600cc    
H4 = Historic Category 4b over 1600cc which comply withy R49.1.5    
N3 = Current and former FIA Group N3 cars*(* FIA homologated and formerly homologated cars complying with their homologation papers.)    
NR4 = Current and former FIA Group N4/NR4* cars (* FIA homologated and formerly homologated cars complying with their homologation papers. Class NR4 cars permitted to use non-homologated composite bumpers and front wings)    
R2 = All FIA R2(B) cars    
B10 = Over 1400cc up to 1600cc    
B11 = Over 1600cc up to 2000cc    
B12 = Over 2000cc two-wheel-drive, including all FIA R3T cars    
B13 = Over 2000cc four-wheel-drive that do not qualify for Class NR4 or B14, plus any FIA R4 cars.    
B14 = Current and former World Rally cars with a sequential gearbox, plus current and former S2000, RRC and R5 cars and any derivatives.