Will I need to make my papers published before October 2006 accessible through UK PubMed Central (UKPMC)?
No. The policy only applies to research papers resulting from grants where the proposal was submitted after 1 October 2006, or in the case of MRC establishments to research papers submitted for publication after 1 June 2007. Whilst the MRC would be delighted to see previously published papers deposited, we are in no position to insist on this due to the existence of copyright agreements between researcher and publisher which pre-date our grant terms and conditions. We have specifically advised our researchers to ensure that no such agreements are breached.