Sources with USS remnant emission and bright cores described in Sect. 3.3 in the candidate restarted galaxies. We note that the USS extended values calculated for J110759.92+512035.4 and J115750.75+472403.2 are limits due to partial or no NVSS detection as described in Sect. 3.3. J114312.36+505016.3 and J114837.17+554500.6 with USS remnant lobes and broad Mg emission lines in their SDSS spectra are shown in the middle and right of the bottom panel. 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.