Velocity diagram of the local (d <  1 kpc) stellar halo split in a metal-poor (top) and a metal-rich sample (bottom). The colour-coding of the 2D histogram scales with the logarithm of the number of stars in each bin. All stars outside of the red dashed line are tentatively labelled as halo stars and are shown as black dots. We note that most if not all of the halo left of the dashed vertical line (v_ϕ <  −100 km s⁻¹) is more metal-poor than [Fe/H] = −1.