  O(\alpha) QED radiative corrections to polarized neutral current
leptoproduction of heavy quark flavours are calculated in the leading log
approximation for HERMES, COMPASS, and HERA kinematics. Besides the inclusive
case, we derive general $z_h$-differential formulae for the polarized boson
gluon fusion process and use them to calculate radiative corrections to
semi-inclusive polarized heavy flavour production in the case of HERA
kinematics.
