Positional RA and Dec offsets of the LOFAR sources compared to TGSS-ADR (Intema et al. 2017, red), VIDEO VLA observations (Heywood et al., in prep., green), FIRST (Becker et al. 1995; Helfand et al. 2015, cyan), and GMRT observations (Tasse et al. 2007) at 240 MHz (blue) and 610 MHz (magenta). The histograms are both modelled as a Gaussian and the median values are used to quantify the average offsets. The values of these are given in Table 6. For the histogram, the errors are calculated by the 16th and 84th percentiles.