Lipid bicontinuous cubic phases are self-assembled three dimensional lattices, consisting of a single periodic bilayer interwoven by two independent water channels. They can be dispersed in aqueous media and coated with a pluronic to form uniform particles, termed cubosomes. The size of the water channel can be tuned by varying the lipid composition. This proposal characterises changes to cubosomes in response to such variations in lipid composition on multiple length scales, i.e. the lattice parameters and overall particle size. Specifically, it will be the first kinetic study using neutron scattering to monitor the online conversion of cubosome lipid compositions as they form highly curved lipid phases. The findings are essential to fundamentally characterise diagnostic assays, under development within our lab for in vivo applications and commercialisation.