Received: 23 September 2020
Accepted: 19 November 2020
First Online: 25 November 2020
Ethics approval and consent to participate
: This project met National Institute for Healthcare Research (NIHR, UK) criteria for service evaluation and formal ethical approval was therefore not required. All data used for this study were routinuously collected as part of standard prehospital and hospital patient data collection. The project was approved by the AAKSS Research & Development Committee. The study has been performed in accordance with the ethical standards laid down in the Declaration of Helsinki.
: Not applicable.
: All Authors are employees of Air Ambulance Kent, Surrey and Sussex.