The championship sporting regulations (available here: https://britishrallychampionship.co....ulations-1.pdf) has one class in the National section for 4WD cars, which is class 6. The definition isThe Open class definition isQuote:
Class 6 - Any 4WD car not classified in BRC1, BRC3 or Motorsport UK Open Title class
My interpretation is:Quote:
WRC cars running in their homologation specification from before 31/10/2016, as well as any Rally2/R5 derived car not complying with BRC1
Any Rally2 or R5 car running outside its homologated specification (apart from an authorised coversion from LHD to RHD) would have to run as an Open entry.
Rally2 or R5 running as homologated are in BRC1.
Rally3 cars are in BRC3.
So that leaves National Class 6 for GpA & GpN 4WD cars and their derivatives (& GpB Citröen Visas - if there are any left!).