TIDES has received ethical approval from King’s College London Research Ethics Committee for Psychiatry, Nursing and Midwifery (reference number: HR-17/18-4629 for Phase 1 and RESCM-19/20-4629 and RESCM-20/21-4629 for Phase 2) and the Health Research Authority (reference number: 18/HRA/0368; Integrated Research Application System ID: 230692).