Comparison of the [O I]λ6300 and [O I]λ5577 emission in the X-shooter data. In both panels [O I]λ6300 is shown in green, [O I]λ5577 in red. Left: flux-normalised line profiles sampled at the source position. The estimated radial velocities of the blue- and red-shifted lobes are shown with vertical blue and red dashed lines at −100 km s⁻¹ and +20 km s⁻¹, respectively, while the 0 km s⁻¹ velocity position is shown with the vertical black line. Right: PV maps from the X-shooter spectra showing the blue-shifted jet lobe, with contours starting at 3σ of the background level. On both axes the 0 position is marked with a black dashed line.