The results of the UK-based 2015 PROUD study, evaluating the effectiveness of HIV pre-exposure prophylaxis, or PrEP, amongst a high-risk group of gay and bisexual men, showed that daily use reduced the number of HIV infections by 86 per cent in this group, and that, when taken properly, the effectiveness was nearly 100 per cent. Noting that, how do you respond, given your comment about your engagement with the Terrence Higgins Trust, to their call for this to be provided alongside other prevention interventions, such as condom use, behaviour change, and regular HIV testing?