Different morphologies of candidate restarted radio galaxies in the final sample presented in Sect. 3.5. Top panel: Examples of FRII-type candidate restarted radio galaxies (left: an example FRII-type with all structures connected, right: an example FRII-type with structures not connected). Middle panel: Two FRI-type candidate restarted radio galaxies (left: an example FRI with fading lobes, right: an example lobed FRI). Bottom panel: Examples of core-with-halo type candidate restarted radio galaxies. The contours represent: VLA FIRST radio contours (white), LOFAR radio contours of the high-resolution maps (black), and NVSS radio contours (purple) are overlaid on the LOFAR 20″ resolution maps (orange) for these sources. The host galaxy position is marked with a yellow cross. The morphologies of all 69 candidate restarted radio galaxies in the final sample, presented in Sect. 3.5 are shown in Figs. B.1–B.5.