The document discusses the progress and sustainability of open access (OA) publishing in the UK and US, highlighting governmental policies, compliance, and funding mechanisms from various research councils and institutions. It emphasizes the importance of transitioning to an OA model by 2020, supported by strategies to enforce compliance, alongside challenges posed by differing approaches between North America and Europe. Several financial models and author studies are referenced to assess the implications of article processing charges (APCs) and the sustainability of OA publishing.