Received: 31 October 2018
Accepted: 26 August 2019
First Online: 9 September 2019
Ethics approval and consent to participate
: Ethics approval was obtained through the Leeds Beckett University (formerly Leeds Metropolitan University) Health and Social Sciences Faculty Ethics Committee. Written informed consent to participate was obtained from all participants (all members of school staff) involved in the study.
: Not applicable (there are no details reported on individuals within the manuscript).
: The authors declare that they have no competing interests.