Cluster M₅₀₀ mass vs. redshift for all clusters in the LoTSS DR2 – PSZ2 sample. Red circles denote clusters which host at least one RR. Black circles denote all other clusters in the LoTSS DR2 – PSZ2 sample (Botteon et al. 2022). PSZ2 G107.10+65.32 S is plotted as a red star, since the mass reported in the PSZ2 catalogue likely comes from both sub-clusters, PSZ2 G107.10+65.32 N and PSZ2 G107.10+65.32 S. The 50% PSZ2 completeness line is shown in blue.