Colour-composite image of the FR-II type radio galaxy 7C 1557+2712. Colourscale is as Fig. 1, with yellow-through-red colours tracing an increasingly steep spectrum. The contours denote the radio surface brightness measured by MeerKAT at 1283 MHz as per Fig. 2. Cyan marker points to the candidate host galaxy (z_phot = 0.760 ± 0.047) which has a compact radio counterpart detected by MeerKAT at 1283 MHz but not by LOFAR at 143 MHz, suggesting an inverted spectrum.