Spectra and photo-spectra of the targets. Left panels: WHT/ISIS spectra of very metal-poor candidates identified according to Table 2. The Ca II H & K lines and the Hydrogen lines Hβ, Hγ, and Hδ, as well as the G-band, are clearly seen. Right panels: J-PLUS photo-spectra of the very-metal poor candidates. The points are color-coded according tothe J-PLUS filters; squares represent the broadband filters and circles represent the narrowband filters.