The data that support the findings of this study are openly available at the following DOI: Vo�Bui, N., Khanbareh, H., Bowen, C., Roscow, J., in press. Dataset for "Understanding the role of aligned porosity on the intrinsic and extrinsic contributions to the dielectric permittivity of freeze-cast ferroelectrics". Bath: University of Bath Research Data Archive. https://doi.org/10.15125/BATH-01332.