Total radio luminosity function (black solid line), derived by convolving the radio AGN incidence with the stellar mass function, decomposed into the contribution from radio AGN of varying radio morphology (compact – light blue; complex – dark blue) and host galaxy stellar mass (same colour map as Fig. 1). The RLF is in good agreement with Sabater et al. (2019) (squares; error bars often too small to be seen). Dashed lines indicate extrapolation of the incidence distribution, and thus the RLF, and the grey-shaded region represents the uncertainty on the RLF (see text for more details).