Radio SEDs of GRB 160131A from 0.8 to 25.8 d in a multi-component approach. Top left: data together with the sum of two BPLs at 0.8 d. Top right: radio data at 1.7 d together with the sum of a SPL and two BPLs. Bottom left: data together with the sum of a SPL and a BPL at 5.8 d. Bottom right: radio SED at 25.8 d fitted with the sum of a SPL and two BPLs. Black lines show the resulting modelling, and green dash-dotted or dotted lines indicate each component. Filled circles indicate detections, and upside-down triangles indicate 3σ upper limits.