Purpose – The National Institute of Health Research MHRN established the Feasibility and Support to Timely recruitment for Research (FAST-R) service in 2011, to provide rapid patient and carer feedback on research documents, prior to ethical review. The aims were to improve the feasibility of studies, to speed up regulatory processes and enhance study set up and completion. The purpose of this paper is to explore whether and how the FAST-R service benefits the review process.