The HSCC Classic Clubmans Championship is for Pre-1981 front-engined Clubmans sports racing cars with cycle type front mudguards, as defined in the Championship regulations divided into the following classes:
- Class A: Pre ’81 Chassis with 1700cc Ford X-Flow full race engines.
- Class B: Pre ’81 Chassis with 1600cc Formula Ford X-Flow engines
- Class C: Pre ’72 Chassis with 4 cylinder normaly aspirated period engines
- Class INV: Invitation class for Clubmans type cars that will be allowed to race only on the specific invitation of the Classic Clubmans Standing Group.