Further to JISC's (UK) excellent "Total Cost of Ownership" studies,
approach, and negotiations, it appears the organization has had good
success in negotiating with publishers to avoid "double-dipping,"
wherein universities could pay twice: once via institutional
subscriptions to journals and again when authors pay APCs (article
processing charges).
See this release from University College London:
http://www.ucl.ac.uk/news/news-articles/1014/291014-publishers-open-access
This is an important accomplishment. Any more information