RecruitingGenetic interventionAn Optimised GA Interventional Trial (Opti-GAIN) to Test if Treatment With CTx001 is Safe and Works for People With Geographic Atrophy (GA)This is a clinical study to evaluate the safety, tolerability and efficacy of CTx001, administered via a single subretinal injection, for GA (secondary to AMD). Safety and efficacy will be measured at regular intervals for 2 years after which long-term safety will be assessed annually for up to 5 years.