Using the multi-object adaptive optics demonstrator RAVEN to observe metal-poor stars in and towards the Galactic Centre. - Lamb, M.; Venn, K.; Andersen, D.; Oya, S.; Shetrone, M.; Fattahi, A.; Howes, L.; Asplund, M.; Lardière, O.; Akiyama, M.; Ono, Y.; Terada, H.; et al. (Monthly Notices of the Royal Astronomical Society, 2017)