As in Fig. A.4, but here showing the impact of uncertainties on the orbital evolution of the individual systems. For each galaxy, we show as grey lines 100 realisations made by a Monte-Carlo sampling of the position and velocity vector, taking into account errors on distance, proper motion and radial velocity. We show results assuming that the satellites have a total mass of M_S = 5 × 10⁹ M_⊙ (left panels) and M_S = 5 × 10¹⁰ M_⊙ (right panels); the black solid line in all panels represents the MW virial radius r_vir = 245 kpc.