Round 5 & 6 - 2026 Gurston Down Championship & Round 3 - Top Ten Challenge

Class 16a - Rally Cars INV12 - Tunbridge Wells Motor Club All Circuit Sprint Championship INV18 - Downton Motor Club Speed Championship Class 6 - Modified Cars - Limited Production Marque Sports Cars over 2000cc Class 14 - Classic Clubman Cars, Ford Engine, up to 1700cc Class 4-JNR - Standard Cars up to 110 BHP Junior Drivers Class 4-MX5 - Road Cars - MX5 Cars Class 4-STD - Standard Cars Class 4a - Road Cars - Series Production up to 1400cc Class 17a- 500 Owners Association - Other Cars INV28 - Porsche Club GB Speed Championship Class 5 - Modified Cars - Limited Production Marque Sports Cars up to 2000cc Class 20a - Formula Ford Racing Cars manufactured pre-1994, Kent Crossflow engines only. Pre-1994 rules apply Class 20b - Racing Cars built up to 1985 Class 7 - Modified Cars - Series Production up to 1400cc Class 8 - Modified Cars - Series Production over 1401-2000cc Class 9 - Modified Cars - Series Production over 2000cc Class 11 - Modified Cars - Specialist Production Cars, any capacity Class 13 - Historically Interesting Cars, pre 1972, any capacity Class 15a - Sports Libre Cars up to 1400cc Class 15b - Sports Libre Cars 1401-2000cc Class 16 - Sports Libre Cars over 2000cc Class 18 - Racing Cars up to 600cc Class 19 - Racing Cars over 600 cc and up to 1100cc Class 20 - Racing Cars over 1100cc and up to 1600cc Class 17 - Racing Cars up to 500cc complying with the eligibility rules of the 500 Owners Association Class 22 - Racing Cars over 2000cc Class 4c - Road Cars - Series Production over 2000cc Class 21a - Racing Cars over 1600cc and up to 2000cc (Normally Aspirated) Class 21b - Racing Cars over 1600cc and up to 2000cc (Forced Induction) Class 4d - Road Cars - Specialist Production, any capacity Class 4-4WD - Road Cars - Series Production 4WD of any engine capacity Class 9-4WD - Modified Cars - Series Production 4WD of any engine capacity INV10 - The 500 Owners Association Speed Championship (500cc) INV25 - The 500 Owners Association Wally Cuff Trophy Championship (over 500cc) Class 4b - Road Cars – Series Production 1401-2000cc