The National Physical Laboratory (NPL) is currently working together with the WISH instrument team to enable simultaneous real-time high resolution (powder and single crystal) diffraction and electric polarization measurements as function of electric field, temperature and magnetic fields. We propose to commission and use this new metrology capability to investigate industrially relevant materials (not defined at this stage) with >= 10 Hz ac applied electric field. This experiment will be the first to use the new capability and will include an initial (short) commissioning time. This initial work will produce industrially relevant information regarding the crystallographic changes of PZT materials at frequencies up to 10Hz (for which no crystallographic data in dynamic conditions is currently available).