Hydrophobins, hfb2, are secreted fungal proteins, which are strongly surface active and possess powerful emulsion and foam stabilising properties. Understanding their co-adsorption at the oil-water interface with other proteins and surfactants is key to their exploitation in emulsion based formulations. We have used SANS to investigate adsorption of hfb2 / surfactant mixtures at the oil-water interface, and the patterns of adsorption are different to other interfaces. We request here beam time on SANS2D to explore the coadsorption of hfb2 and food grade polysorbate surfactants, such as polyethylene sorbitan monolaurate, where the different interaction between hfb2 and the polysorbate surfactants will result in different properties.