The synthesis of a phase combining electrical polarisation P and spontaneous magnetisation M is hard because of the distinct electronic structure requirements for the main mechanisms producing each property e.g., the closed-shell Ti and Pb cations which produce polarisation in the ferroelectric perovskite oxide PbZr1-xTixO3 do not have the unpaired electrons needed for magnetisation. It is technologically important to efficiently combine these two long-range orders: multiferroic or magnetoelectric information storage offers the possibility to overcome the drawbacks of ferroelectric memory (slow writing) and magnetic random access memory (high power density) and opens the possibility of four state memory with reduced energy consumption. In the experiments outlined below we propose to characterise the nuclear and magnetic structures of three new polar oxides