The U.S. National Science Foundation (NSF) is offering a grant opportunity titled "NSF Directorate for Engineering - UKRI Engineering and Physical Sciences Research Council Lead Agency Opportunity." This initiative aims to facilitate international collaboration by allowing U.S. and U.K. researchers to submit a single collaborative proposal that will undergo a unified review process, thereby reducing barriers to international research partnerships. Proposals should focus on collaborative research in areas intersecting with the NSF's divisions of Chemical, Bioengineering, Environmental, and Transport Systems (CBET), Civil, Mechanical and Manufacturing Innovation (CMMI), and Electrical, Communications and Cyber Systems (ECCS), as well as the U.K. Engineering and Physical Sciences Research Council (EPSRC) themes. The estimated total program funding is $6 million, with approximately 10 awards expected. Proposals can be submitted at any time, and interested parties can reach out to NSF grants.gov support at grantsgovsupport@nsf.gov for assistance.