Looking back to move forward: reflections on the strengths and challenges of the COVID-19 UK mental health research response by Demokowicz, O, Panayiotou, M, Parsons, SD, Feltham, A, Arseneault, L, Ingram, B, Patalay, P, Edge, D, Pierce, M, Creswell, C, Victor, C, O-Connor, RC, Qualter, P