Late light curve of the optical/NIR afterglow of GRB 111209A in Ug′r′i′z′J fit (U being UVOT u, SDSS u′ and HST F336W) with the combination of a broken power-law afterglow component (including two steps at earlier times), a SN component based on the SN 1998bw template, and a late-time host-galaxy value. The U light curve does not incorporate a SN and has been used to determine the (jet) break time and post-break decay slope. The full line is the fit to each colour. For the g′ band, we additionally show the decomposition into afterglow, host galaxy, and SN component. The fit shown is identical to that given in G15; we show the best-fit curves for all filters.