Upper panel: One-dimensional spectrum (grey), photometry (yellow points), and best-fit spectrum and photometry (purple) for JADES-GS8-RL-1. We see evidence of a steep β_UV slope with no strong emission lines. The spectrum shows a clear Lyman α break, a Balmer break, and tentative [OII] emission at the expected wavelengths. Common emission lines are overplotted as dashed lines. Middle panel: Two-dimensional spectrum of slit position versus wavelength colour-coded by signal-to-noise ratio. Bottom panel: Normalised fit residuals showing no high-order modulation with wavelength. The NIRCam filter curves are overplotted.