Phase-space of the observed Gaia-ESO sample: azimuthal velocity, V_ϕ, versus radial velocity, V_r, coloured in density. The upper panels represent the α-poor population, and the lower panels represent the α-rich population. Each population is split into two [Fe/H] bins: metal-poor and metal solar-rich. The blue ellipse represents the halo distribution following the multi-Gaussian approach described in Belokurov et al. (2018) to determine halo contamination within the disc.