Quantum spin liquids (QSL) are novel states of matter that display exotic ground states and fractionalized excitations. In two dimensions, the most promising model system is the S = 1/2 kagome Heisenberg antiferromagnet (KHA), where quantum spins form a geometrically frustrated network of corner-sharing triangles. The mineral vesignieite, BaCu3V2O8(OD)2, which consists of a 0.07% distorted kagome lattice, develops a partially frozen spin state at low temperatures. This static spin structure sets vesignieite apart from other S=1/2 KAFMs such as herbertsmithite, whose spins remain dynamic, and is thought to be a consequence of a significant Dzyaloshinskii-Moriya interaction. We propose to use inelastic neutron scattering to study the temperature dependence os the spin excitations in order to further characterise this unique ground state.