Multiferroic materials are rare and exceptional: they are ferroelectric and ferromagnetic in the same phase and these two properties can couple. Recently, materials with complex magnetic structures that break the centre of inversion symmetry have been identified with large magnetoelectric effects. However, the subtle structural changes that one would expect to accompany these phase changes have not been explored. We intend to understand this phenomenon by investigating a new addition to the multiferroic family: MnWO4 has a paraelectric monoclinic crystal structure best described by space group P12/c1, the crystal has three complex antiferromagnetic phases below T=13.5K. We intend to determine how the fine points of the crystal structure are affected by these magnetic orderings.