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Article History

Received: 9 April 2018

Accepted: 7 January 2019

First Online: 17 January 2019

Ethics approval and consent to participate

: This study was approved by the London School of Hygiene & Tropical Medicine Ethics Committee (Ref 8661). Email invitations and the first page of the questionnaire explained the purpose of the research, the measures taken to protect respondents’ confidentiality and the voluntary nature of participation. Questionnaire respondents were asked to tick a Yes box at the start of the questionnaire to indicate that they consented to take part in the study and were willing to complete an anonymised questionnaire. The participants in the qualitative evaluation received a study information in advance and provided written informed consent at the start of interviews.

: Not applicable.

: Tracey Chantler, Sadie Bell, and Sandra Mounier-Jack report that they were in receipt of funding from NIHR while conducting this research. Vanessa Saliba, Catherine Heffernan, Thara Raj and Mary Ramsay worked for Public Health England for the duration of this research but were not involved in data collection.

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