Upper panel: behaviour of A(Li) as a function of [Fe/H]. The gray points indicate the true measures; red arrows indicate the upper limits. The blue line shows the theoretical behaviour of A(Li) as a function of [Fe/H] in LRGB stars starting from the same initial A(Li). Lower panel: behaviour of the fraction of number of stars with A(Li) > 0.8 and with A(Li) < 0.8 as a function of [Fe/H] computed for four metallicity bins. Vertical error bars represent the uncertainties in the number ratio, the horizontal error bars denote the corresponding metallicity range.