FoF LL (in physical coordinates) as a function of redshift. The dotted green line shows the mean distance to the nearest neighbouring galaxy in physical coordinates with 68% confidence limits (green region). The dashed red line shows the LL scaling derived after shifting the nearby groups to larger distances, together with 68% confidence limits (red region). The solid black line shows the best fit to the scaling relation. The dot-dashed blue line shows the scaling from Tago et al. (2010).