Mass-accretion rate vs. the mass-loss rate in the wind (either the photoevaporative wind alone – blue dots –, or combined with the MHD wind – red dots), obtained from mock observations at random times, selected randomly from a uniform distribution in the interval [0 My, 31.6 My]. Each panel shows the outcome of these experiments for different fixed underlying ψ_DW = α_DW/α_SS, while the initial disc sizes, total α_tot, and (finite) FUV fluxes are drawn randomly (values from Table 1).