Top panel: a comparison between the transmission spectrum resulting from our WHT/ACAM data (black error bars) and the transmission spectrum resulting from Nikolov et al.'s (2016) VLT/FORS data (red error bars). Middle panel: a comparison between the transmission spectrum resulting from our WHT/ACAM data (black error bars) and the transmission spectrum resulting from Fischer et al.'s (2016) HST/STIS data (cyan error bars). Bottom panel: a comparison between the transmission spectrum resulting from our WHT/ACAM data (black error bars) and the transmission spectrum resulting from a combination of Sing et al.'s (2016) HST/STIS data (green error bars) and Nikolov et al.'s (2016) VLT data as presented in Wakeford et al. (2018). In this case, we have truncated the x-axis of Sing et al.'s (2016) data for clarity. Note: the VLT and HST spectra have had small offsets applied so their means are equal to our data.