This document provides an overview of open access from the Office of Scholarly Communication at the University of Cambridge. It defines open access, discusses its benefits for researchers and the public, and outlines the open access policy landscape in the UK including policies from HEFCE, RCUK, and COAF. It also covers open access models like gold, green, and hybrid open access; version control; paying article processing charges; complying with policies as an author with multiple affiliations; and how to find and request open access articles. The key message is to deposit accepted manuscripts in a repository at the time of acceptance.