Participants were recruited through existing community and/or support groups with the assistance of sexual secondly health and/or LGBT (lesbian, gay, bisexual and transgender) organisations. FG discussion topics included existing risk management strategies in sexual health and an exploration of PrEP and TasP (see box 1). Box 1 Focus group discussion guide Part 1 Participants were presented with a number of objects to discuss. Objects included: condoms,

sachets of lubricant, pregnancy test, list of antiretrovirals, mocked up bottle of antibiotics, empty boxes/bottles of truvada, and pictures of: an Oraquick® In-Home HIV Test and rapid HIV tests. What do these objects make you think about? How do these objects relate to risk and HIV? What is risky in relation to HIV? Do you use these objects to manage HIV? What else do you use to manage HIV? Part 2 Provide visual cards of pre-exposure prophylaxis and treatment as prevention provided and explain separately. How might you use these pills? How do you think your friends or sexual partners might use these pills? Are you concerned about the use of pills as a form of HIV prevention? Would these pills change the way people currently manage HIV? What do you think about this? We then conducted

34 in-depth interviews (IDIs) between March and September 2013 with a purposive sample of MSM (n=20) and African participants (n=14) to explore issues emerging from FG findings and examine personal risk management practices in further depth. Half of the IDI participants were HIV negative or untested for HIV, and the other half had been diagnosed with HIV at the time of the interview (MSM, n=10; Africans, n=7). Inclusion criteria did not specify risk behaviour to allow for broad exploration of candidacy factors, including those not related to sexual behaviour. IDI participants were aged 19–60 years and were resident in four Scottish regions (Glasgow, Lothian, Lanarkshire and Grampian). Tailored flyers and posters were distributed

to: workshops GSK-3 and support groups; community sexual health testing clinics; gay bars, saunas and clubs; an MSM mail-out condom programme; commercial venues (eg, African food and barber shops) and in educational settings known to have large African student populations. Community organisations also made contact with potential participants through their regular online and face-to-face outreach and support work. Interviews took place in private spaces, in partner organisations or in participants’ own homes, and focused the acceptability of PrEP and TasP, including awareness, potential use, concerns and combination with other and/or existing risk management strategies (such as TasP, serosorting, etc) (see box 2). Box 2 Interview topic guide for HIV-negative or untested participants 1.