This document summarizes a study analyzing impact case studies submitted to the 2014 UK Research Excellence Framework (REF) relating to international development research. The study identified 287 case studies relevant to international development through keyword searches for terms like "DFID" and by topic modeling. Researchers analyzed the case studies to identify themes like the sectors and beneficiaries of impact, as well as the involvement of UK development organizations. The analysis is limited by the selective nature of REF submissions and the fact that funders like DFID are not always mentioned.