Crocker, J C.Farrar, NCook, J A.Treweek, SWoolfall, KChant, ABostock, JLocock, LRees, SOlszowski, SBulbulia, R2020-12-022020-12-022020-12Crocker, J C, Farrar, N, Cook, J A, Treweek, S, Woolfall, K, Chant, A, Bostock, J, Locock, L, Rees, S, Olszowski, S & Bulbulia, R 2020, 'Recruitment and retention of participants in UK surgical trials : survey of key issues reported by trial staff', BJS Open, vol. 4, no. 6, pp. 1238–1245. https://doi.org/10.1002/bjs5.503452474-9842ORCID: /0000-0002-8109-1930/work/83704605ORCID: /0000-0002-7239-7241/work/186968401https://hdl.handle.net/2164/15439Source of Funding This research was supported by the National Institute for Health Research (NIHR) Oxford Biomedical Research Centre (BRC) (NIHR-BRC-1215-20008) and by the Medical Research Council (MRC) Network of Hubs for Trials Methodology Research (MR/L004933/1-N66), as part of the wider PIRRIST project. The views expressed are those of the authors and not necessarily those of the NHS, the NIHR or the Department of Health. The Health Services Research Unit, University of Aberdeen, receives core funding from the Chief Scientist Office of the Scottish Government Health Directorates. The funders had no input into the study design, data collection, analysis, interpretation or manuscript writing. ACKNOWLEDGEMENTS We are grateful to all survey respondents and to PIRRIST study collaborators and advisers who helped to promote survey. We thank Caroline Jordan and Liz Woolliams for providing administrative support; Rebecca Harmston for providing valuable advice from a patient perspective; Murat Akkulak at the Royal College of Surgeons for providing the RCS portfolio of surgical trials; Amadea Turk for helping to identify potential participants; and colleagues who kindly piloted and helped to improve the survey including Kerry Avery, Karen Barnett, Helen Bulbeck, Marloes Franssen, Nicola Higgins, Jennifer Hirst, Lynne Maddocks, Peter McCulloch, James Shepperd, Jean Simmonds and Sharon Tonner. Anonymised survey data can be made available on request. Please contact the corresponding author. This study was not preregistered. The authors declare no potential competing interests.8309688engRANDOMIZED CONTROLLED-TRIALSR MedicineMedical Research Council (MRC)MR/L004933/1-N66National Institute for Health Research (NIHR)NIHR-BRC-1215-20008Supplementary DataRJournal article10.1002/bjs5.5034546