Participant identification

Potential participants will be identified primarily through NGOs and primary care teams, all designated as Participant Information Agencies (PIAs). PIAs will be provided with a short summary of the study including the main inclusion and exclusion criteria. They will be asked to display posters and leaflets and discuss the study opportunistically with AS&Rs who access the services. All participant-facing documentation will have the necessary approvals from a Research Ethics Committee (REC).

Potential participants will be made known to the research team via one of the following methods:

By them contacting the research team directly via telephone or email

By agreeing to their details being given to the research team (via a participant recommendation form, completed by the PIA with the AS&R, and returned to the research team by the PIA)

By attending a researcher-attended drop-in session at collaborating NGOs on a specific date/time, advertised by posters/leaflets/verbally

Following identification of a potential participant, a postdoctoral researcher based in the University of Liverpool, who is trained in the PROSPER trial techniques and in discussion about informed consent, will arrange a meeting to give more information about the trial.