Ratio of angular momentum at the end of hydrogen burning L_final to angular momentum at the start of hydrogen burning L_initial, as a function of mass for MW (top) and SMC (bottom) metallicities. The colour of the points represents the initial critical velocity fraction v_rot/v_crit. Models with a growing helium surface abundance throughout the duration of their evolution are marked by a black circle. Models with a growing helium surface abundance for part of their evolution are marked by a red circle.