GAMA spectroscopic redshift distribution (top-panel; blue), overlaid with our approximately PAUS-like photometric redshift distribution (top-panel; red) – these photo-z are created by applying a redshift- and magnitude-dependent Gaussian scatter (middle-panel; Eq. (14)) to the spec-z, along with a probabilistic ‘kick’ (bottom-panel; Eq. (15)) to generate catastrophic outliers, and a manual relocation of some galaxies to z_phot. ∼ 0.27 (see Sect. 3.3). Bottom-panels are hexagonally-binned 2D histograms, with cells coloured according to the mean GAMA spec-z of objects residing in each cell.