Source properties for the field. Left panel: LoTSS total-to-peak flux density ratio as a function of peak flux density/rms noise. The solid orange curve shows the division between resolved and unresolved sources (as in Shimwell et al. 2019, Sect. 3.1). The vertical dashed black line represents a signal-to-noise ratio of 5. Right panel: sky distribution of the sources in the centre of the field, with dotted lines at 0.5°, 1.0°, and 1.5° radii. The solid blue circle at a radius of 1.14 denotes where the intensity losses are expected to be 50% due to bandwidth and time smearing. In both panels, all sources detected in the DDF-PIPELINE catalogue are plotted as grey points, with LBCS sources marked with purple circles. The darker, larger purple circles show LBCS sources within 1.5° of the phase centre and having a combined FT Goodness value >4. The delay calibrator is marked with an orange cross-hair. Directions of interest (DOIs) are marked by the star symbols.