Y-RANT is an annual conference primarily aimed at early career researchers in the UK (Ph.D. students and postdocs) working in or interested in algebraic number theory, analytic number theory and related topics. This is the fifth edition of the conference, which will be hosted at the University of Cambridge. This is a great chance to meet other early career number theorists, get a feeling for the interests of the broader community, and discuss your ideas in a friendly and engaging environment.