  I review the status of the calculation of two-loop QCD corrections to
non-leptonic B-decays in the framework of QCD factorisation. In the case of
heavy-to-light decays I will cover the leading penguin amplitudes a_4^u and
a_4^c. For heavy-to-heavy transitions I will discuss the amplitude a_1(D^(*)
pi). In both cases I will present some computational details, especially on how
to obtain analytical results for the master integrals in a canonical basis,
which in turn enables us to derive analytical expressions for almost all terms
in the amplitudes.
