Li abundance in the LRGB of the five studied globular clusters as a function of [Fe/H] (filled red squares). The calculated primordial abundances for these clusters are the empty red squares. These are compared to literature measurements of the lithium abundance in the LRGB (black points at low Li abundances) and in the turn-off stars (grey points at high Li abundances) of globular clusters in the Galaxy. Also, the Big Bang nucleosynthesis prediction from Coc et al. (2014) is included and shown as a blue line, with the dashed blue lines representing its reported uncertainties.