Abstract: This report provides 10 examples of projects where members of the public were involved in the development of National Institute for Health Research (NIHR) funding applications. The lead researchers were interviewed in each case, and asked to describe the impact of public involvement on their research. Overall, the public involvement helped to: •	identify the research question •	influence the outcome measures •	define the methods used •	maintain a focus on the interests of patients/ the public •	keep the research grounded and meaningful •	make participation easier for the research participants •	improve the accessibility of the information produced for participants •	shape the plans for public involvement in the project •	define the most useful project outputs •	promote multidisciplinary working across teams •	develop a dissemination strategy.