Colour–magnitude diagram for the Gamma Vel targets. Blue diamonds show the Li-rich targets we select as members (see Fig. 3); red circles are Li-rich targets that do not follow the sequence defined by the bulk of cluster members and are excluded. Solid red lines show isochrones from the Baraffe et al. (1998) evolutionary models (see text), shifted to a distance modulus of 7.76 mag, with reddening E(V − I) = 0.055 and extinction A_V = 0.131 applied.