Received: 24 June 2020
Accepted: 16 November 2020
First Online: 25 November 2020
Ethics approval and consent to participate
: Ethics approval was not sought for this study. The study was a secondary analysis of anonymised aggregate data that were published by Public Health England and NHS digital in ‘public domain’ and could be accessed online.
: Not applicable.
: The authors declare that they have no competing interests.