The Medical Research Council (MRC) Gay Men's Sexual Health Survey in Glasgow and Edinburgh collected anonymous, self‐complete questionnaires and oral fluid specimens (using OraSure® Oral Specimen Collection Devices; OraSure Technologies, Inc., Bethlehem, PA, USA) in 17 gay commercial venues in May 2011, using a form of time and location sampling 9. Overall, 1515 men participated [65% response rate (RR)] and 1218 provided oral fluid samples (52% RR).