Research Libraries UK (RLUK), the British Library (BL) and the Research Information Network (RIN) recognise the importance of facilitating the discovery of the widest possible range of research materials for the UK research community, as simply as possible. We believe that through encouraging libraries to expose their holdings for this purpose, and providing practical support to enable this, benefits can be quickly delivered to research institutions and researchers alike. RLUK, BL and the RIN have therefore jointly contributed to a 'Challenge Fund' to enhance Copac by significantly extending the range of research material it covers. In February 2007, the Challenge Fund panel announced the 12 libraries whose collections were to be loaded onto Copac. The data for all 12 libraries has now been loaded, and a further five libraries announced. Loading has begun for these 5 libraries, and is expected to be completed by Spring 2009.