Angular two-point correlation from the LoTSS-DR1 value-added source catalogue after masking with “mask d”, “mask 1”, and “mask 2” at flux densities above 1 mJy (top) and 2 mJy (bottom) for data-mock pairs; see caption of Fig. 21 for further details. We fitted the data of “mask 1” to the power-law model described in the text. Positive and negative values are shown with full and open symbols, respectively. The grey shaded region indicates angular separations with decreasing number of weighted pair counts.