Surfactants ability to lower surface tension and act as solubilising agents is critical for their wide use in everyday products. An oily hydrocarbon (HC) "tail group" attached to highly water compatible "head group", gives a molecule that forms nanoscale assemblies in solution. With fluorine atoms in the tail, the surfactants are much more effective, and for some applications these fluorocarbon (FC) surfactants are the only option. They are, however, much more expensive, and can be more environmentally damaging, so a mixture of HC and FC surfactants could provide the best of both worlds. Unfortunately, the behaviour of HC/FC mixtures is far from predictable. SANS is unique in ability to highlight HC and FC surfactants individually, allowing us to work out how each contributes to the structures formed, and in future design mixed systems with minimum FC content and maximum performance