Histogram of the absolute flux difference between the flux of the injected sources and the Hyper fluxes at each wavelengths with flux measured in the 500 μm aperture region as described in Sect. 4.4. The sources are 145 at each wavelength, all the sources with no clustered companions as described in Sect. 4.4. The figures show the 70 μm (upper left panel), 160 μm (upper right), 250 μm (centre left), 350 μm (centre right) and 500 μm (lower panel) distributions.