  In this paper, we present numerical and experimental results on helicity
oscillations in a liquid-metal Rayleigh-B\'enard (RB) convection cell, with an
aspect ratio of 0.5. We find that helicity oscillations occur during
transitions of flow states that are characterised by significant changes in the
Reynolds number. Moreover, we also observe helicity oscillations at flow
conditions where the temporal gradient of the change in the Reynolds number is
significantly smaller than that of the helicity. Notably, the helicity
oscillations observed during the transient double-roll state exhibit
characteristics remarkably similar to those associated with the Tayler
Instability.
