Fractional contribution to total radio luminosity function at different epochs versus radio luminosity at 1.4 GHz for GGs (solid lines as in Fig. 5) and for different populations (dotted lines): AGN (top; labelled AGN v tot) and SFGs (bottom; labelled SFG v tot). Dotted-dashed lines show the fractional contribution of an AGN (labelled AGN v GG) and SFG (labelled SFG v GG) to the GG RLF. For reference, we plot the fraction of scaled AGN RLF (top) and scaled SFG RLF (bottom) to scaled GG RLF with dashed lines. Different colours represent different redshift bins as in Fig. 5. A halo mass cut of M_200c > 10^13.5 M_⊙ was applied.