RT Journal Article SR Electronic T1 Predeployment Collective Training under lockdown: lessons learnt from the COVID-19 pandemic JF BMJ Military Health JO BMJ Mil Health FD British Medical Journal Publishing Group SP bmjmilitary-2020-001611 DO 10.1136/bmjmilitary-2020-001611 A1 Grant Milne YR 2020 UL http://militaryhealth.bmj.com/content/early/2020/11/18/bmjmilitary-2020-001611.abstract AB Completing meaningful and high-fidelity Collective Training during the COVID-19 pandemic presents an entirely new set of challenges to both the Chain of Command and supporting medical assets. Under Project PHOENIX, the Field Army will gradually phase the return of Collective Training, starting with Deployed Operation Force Generation. This article describes the personal experiences and challenges faced by 1st Battalion Coldstream Guards Battle Group and the Mission Training and Mobilisation Centre to enable the Operation SHADER 11 Mission Rehearsal Exercise, the first Collective Training the Field Army completed during the national lockdown.