  Using $pp$ collisions corresponding to 3$\,\text{fb}^{-1}$ integrated
luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and
8$\,\text{TeV}$, the ratio of branching fractions \begin{align*}
\mathcal{B}(\Lambda^0_b\!\to\psi(2S) \Lambda )/\mathcal{B}(\Lambda^0_b\!\to
J/\psi \Lambda)= 0.513 \pm 0.023\, (\text{stat}) \pm 0.016 \, (\text{syst}) \pm
0.011\, (\mathcal{B}) \end{align*} is determined. The first uncertainty is
statistical, the second is systematic and the third is due to the external
branching fractions used.
