Extinction-corrected colour-magnitude diagrams. Top row: Full Gaia DR3 XP sample (before filtering results with large uncertainties). Top left: 2D histogram. Top middle: colour-coded by median metallicity per bin. Top right: Colour-coded by median metallicity uncertainty per bin. Middle row: Same as top row, but flag-cleaned (using xgb_av_outputflag, xgb_logteff_outputflag, and xgb_met_outputflag). Bottom row: white-dwarf portion of the colour-magnitude diagram (filtered by log g > 7). Bottom left: 2D histogram. Bottom middle: mass colour-coded by median mass. Bottom right: mass colour-coded by mass uncertainty.