1 Epidemiology and aetiology of paediatric traumatic cardiac arrest in England and Wales. Authors: James Vassallo, 1,2 Melanie Webster, 3 Edward BG Barnard, 4 Mark D Lyttle, 3,5 Jason E Smith, 4 On behalf of PERUKI. Affiliations: 1 Division of Emergency Medicine, University of Cape Town, Cape Town, South Africa 2 Institute of Naval Medicine, Gosport, United Kingdom 3 Emergency Department, Bristol Royal Hospital for Children, Bristol, BS2 8BJ, United Kingdom. 4 Academic Department of Military Emergency Medicine, Royal Centre for Defence Medicine (Research & Academia), Medical Directorate, Joint Medical Command, Birmingham, United Kingdom. 5 Faculty of Health and Applied Sciences, University of the West of England, Bristol, BS16 1QY, United Kingdom. Address for correspondence/reprints: Dr James Vassallo, Institute of Naval Medicine, Gosport, PO12 2DL, UK vassallo@doctors.org.uk, Phone 00447779572621. Conflicts of interest: We can confirm that there are no conflicts of interests to declare. Three of the authors (JV, EB and JES) are serving members of the Royal Navy. Funding: No funding was received for this study. Word Count: 2971