Multiferroic materials which exhibit both ferroelectric and (anti)ferromagnetic ordering are of great technological importance offering the potential for the design of novel multifunctional devices such as transducers, actuators, sensors and memories. A particularly promising avenue of research, given the extensive research literature on perovskites themselves, is to construct MOFs with the perovskite topology, in which the oxide bridges between metal ions are replaced by polyatomic anions. One such is Cu-guanadinium-format, which is not only interesting by virtue of its potential to be multiferroic but its magnetic properties are also non-trivial, both driven by the Jahn-Teller distortion. This proposal seeks to investigate these properties.