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Cosmic-ray and gamma-ray observations have yielded several notable excessesthat often lend themselves to explanation by various dark matterannihilation/decay models. In particular, the AMS-02 anti-proton and positronexcesses have continued to grow more robust with the collection of more data.This is supplemented by gamma-ray excesses in the Galactic Centre and ahigh-energy break in spectrum of electron/positron cosmic rays seen by DAMPE.In this work we carefully model the magnetic field environments of M31 and M33and use this to estimate expected synchrotron emissions from electrons producedvia dark matter annihilation. By comparing this to available radio data wereview simplifying assumptions used previously for dark matter hunting in theseenvironments and produce novel constraints that are capable of fully ruling outdark matter models proposed to accommodate all the aforementioned excessesbarring that of DAMPE. However, we do show that significant constraints can beplaced upon the DAMPE parameter space with M31 data. In addition to this weproject SKA non-observation constraints for the Reticulum II and Triangulum IIdwarf galaxies and find these have potential to rule out cosmic-ray andgamma-ray excess-producing models of dark matter, even when the mostconservative assumptions are employed.

An excess of excesses examined via dark matter radio emissions from galaxies