Abundance ratios vs metallicities for F, Mg, Al, Si, S, Ca, Ti, and Cr for stars in the NSD (green triangles). Comparison populations are also included: (i) solar-neighbourhood thin-disc (denoted ‘SN thin disc’ in the legend) and thick-disc (‘SN thick disc’) stars are represented by red circles and yellow diamonds, respectively; (ii) stars observed in the inner-bulge field located at 1° north of the Galactic centre – (l, b) = (0°, +1°) -are shown as blue squares (‘BP1’, i.e. BP1 = ‘B Plus 1’); and (iii) stars observed in the NSC are indicated by black star symbols. See the main text for references. The green open triangles (‘NSD Thin’) represent the abundances for the NSD stars determined using alternative stellar parameters with the assumption that oxygen abundances follow the thin-disc trend, which would imply typical uncertainties. We present the abundance panel for potassium, K, to demonstrate consistency with the figures for the NSC in Nandakumar et al. (2025). However, we were unable to obtain reliable K abundances for the NSD.