Positions of the GAMA FoF groups compared to X-ray cluster complexes. X-ray clusters from XXL Paper XX that overlap one another within 5000 km s⁻¹ and 2 Mpc are shown as black dashed circles with a radius of 2 Mpc at the X-ray source redshift. Red crosses show the positions of GAMA groups that match to these X-ray sources in redshift space. These systems may be infalling or merging into cluster complexes, which may affect their properties. They have therefore been excluded from our analysis.