Histograms showing the stellar mass, radio luminosity, physical size and λ_Jet distributions of different subsets of radio AGN: compact (light blue filled), complex S_Code = S (black, unfilled), complex S_Code = M (magenta, hatched) and complex S_Code = M sources with physical sizes > 60 kpc (dark blue filled). This shows that the sources responsible for the boosted radio AGN incidences at high jet powers are the ones best modelled by multiple Gaussian components and large physical sizes.