HEFCE and the other three UK funding bodies have published details of a new policy for open access relating to future research assessments after the current 2014 REF.
The policy describes new eligibility requirements for outputs submitted to the post-2014 REF. These requirements apply to all journal articles and conference proceedings accepted for publication after 1 April 2016. They do not apply to monographs, other long-form publications, creative or non-text outputs, or data. (...) - HEFCE (Higher Education Funding Council for England), 28 March 2014