Normalised redshift histograms of all galaxies from the HELP catalogue (panel a), separated with the criterion f_350 μm/f_250 μm = 1. Flux densities were estimated using the Herschel observational data as provided from the same catalogue. The vertically dotted coloured lines correspond to the average values of the same histograms, employing the flux densities from the CIGALE best model fit, and are coloured accordingly. The text in the panel denotes the percentage of the sources that present an SFR above 10² M_⊙ yr⁻¹ and are coloured according to the aforementioned criterion. Panel b illustrates the normalised histograms for the dust content of the galaxies in both the HELP and Cosmos2015 catalogues. The blue and orange histograms are derived from galaxies without and with radio VLA 1.4 GHz emission, respectively. The text of the panel demonstrates the percentage of the galaxies that present an AGN component (AGN_frac > 40%) and are placed at z > 3.