JISC has released the JISC Collections Open Access Fees Project: Final Report.
Here's an excerpt:
The focus of this third phase was around the so-called hybrid model of OA publishing and the extent to which this can be seen as an optional model offered by publishers or a transitional one as part of the move away from subscription-based to fully Gold OA.
It began with a series of in-depth one-to-one interviews with stakeholders within the Research Councils, other funding bodies, publishers and representatives from universities including librarians, institutional repository managers and research management. Interviewees were invited to answer a series of questions about the principles of the hybrid journal model, their attitudes towards it, the management of open-access fees at their organisation and their policy. . . .
The results of the interviews were used to develop a workshop for stakeholders to ensure that presentations and discussions were focused on the key issues identified in the interviews. The workshop was held in May 2011 and was the final part of the project.