Radio relic power vs. LLS. The host cluster redshift is on the colour bar. Triangles denote candidate relics and plusses those relics which are part of a double relic pair. All other relics are plotted as circles. Red circles surround relics in clusters which also host a RH. The dotted cyan line is the regression line (orthogonal fit) for our sample, including cRRs, with its corresponding confidence interval shaded. We note that there is no line of best fit excluding cRRs, since the null hypothesis could not be rejected in this case. Both PSZ2 G069.39+68.05 and PSZ2 G107.10+65.32 are excluded.