The Research Information Network has released Paying for Open Access Publication Charges: Guidance for Higher Education and Research Institutions, Publishers and Authors
Here's an excerpt:
This document provides advice and guidance on the arrangements for paying open access publication fees: that is, fees levied by some journals for the publication of scholarly articles so that they can be made available free of charge to readers, immediately upon publication. The guidance is directed to UK HEIs and other research institutions, to research funders, to publishers, and to authors. It is the practical outcome from a working group established by UUK and the RIN. It presents the advice from representatives of the library, publishing and research administrator communities on the practical issues to be addressed in establishing coordinated and strategic approaches to the payment of publication fees.