The UK Open Access Implementation Group (OAIG) have made a statement supporting the rights of authors to deposit a copy of their published work in repositories. "Do you know your publishing rights?" is a response to recent changes in the policies of some publishers.
If authors want to investigate how to retain certain rights, the JISC/SURF Copyright toolbox provides practical suggestions.
"The aim of the UK Open Access Implementation Group is to add value to the work of the member organisations to increase the rate at which the outputs from UK research are available on OA terms."