  We present the prospects of an angular analysis of the $\Lambda_b \to
\Lambda(1520)\ell^+\ell^-$ decay. Using the expected yield in the current
dataset collected at the LHCb experiment, as well as the foreseen ones after
the LHCb upgrades, sensitivity studies are presented to determine the
experimental precision on angular observables related to the lepton
distribution and their potential to identify New Physics. The forward-backward
lepton asymmetry at low dilepton invariant mass is particularly promising. NP
scenarios favoured by the current anomalies in $b\to s\ell^+\ell^-$ decays can
be distinguished from the SM case with the data collected between the Run 3 and
the Upgrade 2 of the LHCb experiment.
