Left: H I column density map of the gas seen in absorption in our VLBI data estimated assuming a gas spin temperature of 100 K. Right: velocity field of the gas detected in absorption, shown in colour. There is a slight velocity gradient along the western lobe and also along the parts of the eastern lobe closer to the core in the north–south direction while such a gradient is entirely missing along the rest of the eastern lobe. The contours in both images represent the radio continuum with the same contour levels as those in Fig. 1.