Relationships between environment richness and 150 MHz radio luminosity for the AGN with detected environments (top), between redshift and radio luminosity/environment richness (middle), and between host-galaxy rest-frame K_S magnitude and radio luminosity/environment richness (bottom). Red and blue show results based on the R14 and W12 catalogues respectively. In the top panel, the shaded areas show the area of parameter space available when limits on the undetected environments are accounted for, with a lower bound given by the mean richness if AGN with an undetected environment are assumed to have an environment of richness zero, and an upper bound given by the mean richness if the richness for undetected to environments is assumed to be the richness detection limit.