Source density (red) and the image RMS (blue) as a function of distance from the pointing centre. The x symbols show the values derived from the previous release of the LoTSS Deep ELAIS-N1 field (Sabater et al. 2021), the + symbols show the values derived from our image using the exact same PYBDSF parameters as Sabater et al. (2021) and the circular symbols show the values derived using our revised PYBDSF strategy described in Sect. 2.1.