  We study Chern-Simons theory on 3-manifolds M that are circle-bundles over
2-dimensional orbifolds S by the method of Abelianisation. This method, which
completely sidesteps the issue of having to integrate over the moduli space of
non-Abelian flat connections, reduces the complete partition function of the
non-Abelian theory on M to a 2-dimensional Abelian theory on the orbifold S
which is easily evaluated.
