Champs
A = BRC - British Rally Championship    
B = BTRDA Rally Championship    
W = Pirelli MSA Welsh Forest Rally Championship    
N = ANWCC Forest Stage Championship    
F = FMP Rally Challenge    
G = Glynne Edwards Memorial Championship    

Class
- = NATIONAL A SECTION (BRC)    
BRC1 = S2000-Rally: 1.6T engine with a 28mm restrictor; S2000-Rally: 2.0 Atmospheric; Group R5 (VR5); FIA R5 homolgated car where the steering has been modified to right-hand-drive. This being the only change to the homolgated status.    
BRC PROD CUP = Group NR4 over 2000cc.    
BRC JUNIOR = R2 (atmospheric over 1390cc and up ton 1600cc - VR2B and turbo over 927cc and up to 1067cc - VR2B)    
BRC CADET = R2 (atmospheric/over 1390cc and up to 1600cc - Vauxhall Adam Cup and Ford Fiesta R2T National and Ford Fiesta 1.6 R2 cars)    
BRC3 = Group A over 1600cc and up to 2000cc; Super 1600; R3 (atmospheric over 1600cc and up to 2000cc - VR3C and turbo over 1067cc and up 1333cc - VR3C); R3 (turbo/up to 1620cc/nominal - VR3T); R3 (diesel/up to 2000cc/nominal - VR3D)    
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    
RF1.4 = BTRDA Rally First cars up to 1400cc    
RF2.0 = BTRDA Rally First cars over 1400cc up to 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 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.