Cut-outs from the g- and u-band images of the 7C-II radio galaxies, showing 20′′ × 20′′ centred on the position of the radio galaxy. Green bars show the position angle of the radio emission. The images have been smoothed using a 3-pixel boxcar average. The image of 5C 7.208 is centred on the southern emission component (5C 7.208 S). The images of 5C 7.47 show ghost-arcs that are due to a bright star positioned elsewhere on the detector array.