Results of next neighbour (NN) search around 72 nearest extreme HVS candidates of high priority (blue filled squares) and low priority (green dots). Neighbours separated by less than 5 arcsec were found for only 16 objects. Plotted over their G magnitudes are the total number of objects within 5 arcsec (top), the magnitude of the NN (middle), and the distance to the NN (bottom). The overplotted crosses are the 11 objects with a close NN expected to have affected the astrometry. One candidate without a NN but with a DR3 Dup flag is shown for comparison (red arrow down).