Correction to: Emerging models and trends in mental health crisis care in England: a national investigation of crisis care systems - Christian Dalton-Locke; Sonia Johnson; Jasmine Harju-Seppänen; Natasha Lyons; Luke Sheridan Rains; Ruth Stuart; Amelia Campbell; Jeremy Clark; Aisling Clifford; Laura Courtney; Ceri Dare; Kathleen Kelly; et al. (BMC, 2021)