Morphological parameters’ plot of the clusters in the sample. Colours are associated with the radio morphology detected with LOFAR: clusters without diffuse emission are represented in black, clusters with a MH in green (for the candidate MH we used a marker not filled), and clusters with a double component radio emission (MH+RH) in red. Clusters with detected cold fronts are represented with a square, otherwise a circle is used. The marker size is proportional to the cluster mass. The dashed blue line indicates the w value used to select clusters in our sample. Dashed grey lines indicate the c and w values which separate clusters with a RH (c ≤ 0.2 and w ≥ 0.012) from clusters without a RH, according to Cassano et al. (2010).