Comparison of the NLTE (black) theoretical transmission spectrum with the HST WFC3/UVIS observations published by Lothringer et al. (2022, red) and the STIS transmission spectrum (green) re-analysed employing a detrending based on one jitter parameter and 3rd order polynomial in time (see text), binned to the same binning of the UVIS spectrum. The horizontal error bars shown for the red and green points correspond to the size of the wavelength bins. The grey horizontal dashed line indicates the broad-band R_p/R_s obtained from EulerCAM (Hellier et al. 2019).