Radio images of active comparison radio galaxies. LOFAR-IB colourmap with contours from the LOFAR18 image in green, LOFAR6 in blue, FIRST in red, VLASS in yellow, and an inset zoomed in on the central part with the LOFAR-IB contours in purple. Contour levels are the same as in Fig. A.1. If the central part of the source is detected in radio images, it is denoted with ‘✓’ in the legend. If the central part is not detected, it is noted with ‘✗’. The yellow ’+’ represents the position of the optical host galaxy. If the optical host galaxy is not identified, the expected position of the nuclear region is noted with red ‘×’.