Studying surfactant and mixed surfactant adsorption on model solid surfaces, which mimic real surfaces such as fabrics, hair and skin, is starting to provide a real insight into their applications in detergency, conditioning and lubrication. We (Oxford, STFC and Unilever) have demonstrated how reproducible model cellulose surfaces can be formed by L-B deposition and studied by neutron reflectivity. The adsorption of cationic, cationic / nonionic surfactant and surfactant /polyelectrolyte mixtures and their impact upon the cellulose surface have now been studied. Some recent preliminary measurements have demonstrated for the first time multilayer formation on cellulose surfaces from the anionic surfactant LAS with CaCl2 at low surfactant concentrations. We request here beam time on INTER/SURF to explore these significant and exciting preliminary observations in more detail