There has been much recent interest in the so-called ¿novel¿ or ¿type-II¿ multiferroics, in which electrical polarisation appears at the onset of a particular type of magnetic ordering. The family of compounds based on LuFe2O4 is of particular current interest because they display ferroelectricity above room temperature and large coupling to magnetism. It is generally believed that ferroelectricity results form charge ordeing (CO) in these materials, but the CO superstructure has never been solved. We have recently grown high-quality crystals of YbFe2O4, showning sharp superlattice peaks, and we have acquired complete X-ray data sets on our lab diffractometer. We request beamtime on SXD to collect complementary neutron data, which will help to unravel the complex superstructure.