All six EPIC-pn spectra of Mrk 110. The spectra are plotted as a ratio against a power continuum of Γ = 1.63 ± 0.01, fitted to the faintest 2019a observation over the 2.5–10 keV band. All the spectra show a soft X-ray excess against the power-law continuum, with the excess being most prominent in the brightest observations. The continuum in all six spectra can be fitted with a two-component model, consisting of Comptonised soft X-ray emission from the disk and a hard X-ray power-law. A weak iron K line at 6.4 keV is also present in all the observations. The EPIC-pn spectra have been re-binned by a further factor of ×5 above the native binning of 100 counts per bin for display purposes.