VLT/UVES optical afterglow spectrum of GRB 240419A at z = 5.178, with a rebinning of 8 times the original wavelength step (0.04 Å). All the plots are in velocity space and show the identified low-ionisation, high-ionisation, and fine-structure absorption lines. The 0 in velocity was fixed to z = 5.1777, which is the strongest low-ionisation component and is aligned with fine-structure lines. In all the panels, data are in black, the error spectrum is in red, and the horizontal dotted line in grey corresponds to F_λ = 0. The green vertical lines correspond to the two main components (z = 5.1777 and z = 5.1734), while the two Si IV components, which show a small shift towards the blue with respect to the other transitions, are highlighted in orange.