Ionising photon emissivity as a function of the minimum Hα luminosity $L_{\mathrm{H}\alpha }^{\min }$ as extrapolated from our observed [O III]+Hβ LF (see Sect. 5.1) in the two redshift bins we investigated. The ionising photon emissivity required to re-ionise the Universe at its measured rate, taken from Bouwens et al. (2015) is shown by the shaded areas and from Mason et al. (2019) in the hatched areas. All of our measurements assume f_esc = 0.14 (Jecmen et al. 2026), the solid lines are extrapolated from this work and the dotted lines assumes α = −2 to  − 2.2, which is similar to the measured faint-end slope of the typical UV LF at this redshift. The black line shows the GLIMPSE depth following the data from Fig. C.4.