Lepton Mixing Predictions from (Generalised) CP and Discrete Flavour Symmetry

An important class of flavour groups that are subgroups of U(3) and that predict experimentally viable lepton mixing parameters including Majorana phases, is the Delta(6n(2)) series. The most well-known member is Delta(24) = S-4. I present results of several extensive studies of lepton mixing predictions obtained in models with a Delta(6n(2)) flavour group that preserve either the full Klein symmetry or a Z(2) subgroup for neutrinos and can include a generalised CP symmetry. Predictions include mixing angles and the Dirac CP phase generally; and if invariance under a generalised CP symmetry is included, also Majorana phases. For this, the interplay of flavour group and generalised CP symmetry has to be studied carefully.