RecruitingPhase 1Drug trialLutathera and ASTX727 in Neuroendocrine TumoursPatients entered into the study will receive ASTX727 orally for 5 days, prior to receiving Lutathera treatment on Day 8, to determine whether pre-treatment with ASTX727 results in re-expression of somatostatin receptor-2 in patients with metastatic neuroendocrine tumours. The study will use \[68Ga\]-DOTA-TATE PET to image epigenetic modification of the receptor locus.