This is interesting stuff from HSCC on licence requirements. Based on changed MSA rules for 2017-
[Q)9.1.2. will be new from 1st January 2017.]
‘(Q)9.1.1. Any Driver competing in a Single Seat Racing Car, 0.5bhp/kg or greater (excluding driver weight), must be the holder of a Race National ‘A’ licence, as a minimum, with the exception of a Championship which has been authorised by MSA to set an alternative qualification.
Q9.1.2. Any Driver competing in a vehicle of 0.34bhp/kg or higher (excluding driver weight) and measured at the driven wheels, with the exception of single seaters as detailed in 9.1.1 above, must be the holder of a Race National ‘A’ licence, as a minimum.’
Full info on how this will apply to HSCC Championships and series in 2017 here.-
http://www.hscc.org.uk/images/MSA_In...lification.pdf