Antiferroelectric materials are attracting extensive attention as potential energy storage devices with higher capacities and lower losses that either piezoelectric and ferroelectric counterparts. However, despite that these materials have been known for decades our understanding of these types of materials is still poor. Lead zirconate is perhaps the prototypical antiferroelectric perovskite. Despite extensive studies above room temperature the low temperature behaviour has attracted less attention. Recently our collaborator has performed ab initio calculations at 0 K. This work suggests that an improper ferroelectric phase is more stable at low temperature. This is exciting as this would be the first time that an improper phase of this type has been observed in a ABO3 perovskite. We therefore propose to perform a careful low temperature study in order to probe this potential phase.