Champs
BRC = The Prestone MSA British Rally Championship    
ARR CRAIB SRC = The ARR Craib MSA Scottish Rally Championship    
ECOSSE = The Ecosse Challenge    
BC = The Border Challenge    
MOTOSCOPE = The Motoscope Northern Historic Championship    

Class
BRC 1 = S2000-Rally: 1.6T engine with a 28mm restrictor, S2000-Rally: 2.0 Atmospheric, Group R5 (VR5), Group R4 (VR4)    
BRC PRODUCTION CUP = Group NR4 over 2000cc    
JUNIOR BRC = R2 (atmospheric over 1390cc and up to 1600cc – VR2B and turbo over 927cc and up to 1067cc – VR2B)    
CADET BRC = R2 (atmospheric over 1390cc and up to 1600cc – Vauxhall ADAM Cup and Ford Fiesta R2T National and Ford Fiesta 1.6 R2 cars)    
BRC 3 = Group A over 1600cc up to 2000cc, Super 1600 R2 (atmospheric over 1600cc up to 2000cc–VR2C and turbo over 1067cc up to 1333cc–VR2C), R3 (atmospheric/over 1600cc up to 2000cc–VR3C and turbo over 1067cc up to 1333cc–VR3C), R3 (turbo /up to 1620cc /nominal–VR3T), R3 (diesel /up to 2000cc /nominal–VR3D)    
BRC 4 = 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    
BRC 5 = Group N up to 1600cc, R1 (atmospheric up to 1600cc - VR1A/VR1B and turbo up to 1067cc - VR1A/VR1B)    
NRC 1 = National Rally Cup Class 1 - All 2WD non-homologated cars up to 1450cc    
NRC 2 = National Rally Cup Class 2 - All 2WD non-homologated cars - 1451cc to 1650cc    
NRC 3 = National Rally Cup Class 3 - Front wheel drive non-homologated cars – 1651cc to 2050cc    
NRC 4 = National Rally Cup Class 4 - Rear wheel drive non-homologated cars – 1651cc to 2050cc    
NRC 5 = National Rally Cup Class 5 - All 2WD non-homologated cars over 2050cc    
NRC 6 = National Rally Cup Class 6 – Any 4WD car not classified in Class 7    
NRC 7 = National Rally Cup Class 7 - Any derivative of FIA R5 car out with its homologation    

Champs
ARR CRAIB SRC = The ARR Craib MSA Scottish Rally Championship    
ECOSSE = The Ecosse Challenge    
BC = The Border Challenge    
MOTOSCOPE = The Motoscope Northern Historic Championship    

Class
1 = 2wd cars up to 1450 cc    
2 = 2wd cars - 1451 to 1650 cc, 8 valves or les    
3 = 2wd cars - 1451cc to 1650cc, more than 8 valves    
4 = 2wd cars - 1651cc to 2050cc, 8 valves or less    
5 = Historic Category 1, 2 & 3 Rally cars as defined in the General Regulations of the MSA    
6 = Fwd cars - 1651cc to 2050cc, more than 8 valves    
7 = Rwd cars - 1651cc to 2050cc, more than 8 valves    
8 = All 2wd cars over 2051cc    
9 = FIA Homologated GpN 4wd cars and cars previously homologated as such, providing these run as their FIA homologation papers    
10 = Any other 4wd car not classified in class 11 or 12 without a sequential gearbox    
11 = FIA Homologated GpA 4wd cars,FIA Homologated Super 2000 cars & FIA Homologated R4 cars,and any other cars previously homologated,providing these run as per their FIA homologated papers.All Metro 6R4's and any derivative therefrom.All other 4wd car not classified in class 12 with sequential gearbox    
12 = FIA Homologated WRC cars and cars previously homologated as such and FIA Homologated R5 cars. Any derivative therefrom    

Class
UP TO 1450 CC = Up to and inc 1450 cc    
1451-1650CC = 1451 - 1650 cc    
1651-2050CC = 1651 - 2050 cc    
2051 & OVER = 2051 & over    
ALL 4WD = All 4wd