Comparisons of the integrated flux recorded by LOFAR to that recorded by TGSS-ADR (black) and MWA (cyan) in panel a and from the rescaled TGSS-ADR catalogue from Hurley-Walker (2017) in panel b. The black/cyan dotted lines show the fit to the data of the ratio between the two fluxes when the median offset of the ratio between LOFAR to TGSS-ADR/MWA is used. The dotted lines indicate the errors associated with these fits (generated using the 16th and 84th percentiles). We quote the value of the median S_LOFAR/S_TGSS and S_LOFAR/S_MWA values and their errors in the lower right corner.