Velocity angle – position angle (Δθ) trends. Top: histogram of difference in angle between proper motion vector (blue), virtual-expansion corrected tangential velocity vector (red), and cluster member position relative to the cluster centre for members of λ Ori (Δθ). Middle: difference in angle between virtual-expansion corrected tangential velocity vector and cluster member position relative to the cluster centre (Δθ) against radial distance (R). Bottom: fraction of members with virtualexpansion corrected tangential velocities directed within 45° of the direction towards to the cluster centre (red) and within 90° of the direction towards to the cluster centre (blue) per concentric annuli containing 50 members.