Angular momentum lost from the disc during the final 1000 yr in terms of the initial angular momentum of the disc for both Fi (dotted) and Gadget2 (dashed). The angular momentum loss associated with processes in the disc, e.g. accretion of ISM, angular momentum exchange between accreted ISM and original disc material, is plotted in green and angular momentum loss associated with ablation is shown in brown. We have omitted the angular momentum loss due to accretion onto the star, because it is insignificant (as discussed in Sect. 4.2).