Research Councils UK (RCUK) have recently announced a significant amendment to their open access (OA) policy which requires all research papers that result from research partly or wholly funded by RCUK to be made open access. To comply with this policy, researchers must either; a) publish in an open access journal, termed Gold OA, which often incurs an article processing charge (APC); or, b) ensure that a copy of the post-print is deposited in an appropriate repository, also known as Green OA.
A subsequent clarification from RCUK stated that Gold OA is the preferred mechanism of choice to realise open access for outputs that they have funded and have announced the award of block grants to eligible institutions to achieve this aim. Where a Gold OA option is unavailable, Green OA is also acceptable; however, RCUK have indicated that the decision will be ultimately left up to institutions as to which route to take.
Go to source: http://www.ariadne.ac.uk/issue70/andrew