This proposal is part of a major EPSRC (EP/GR065705) / Unilever funded programme to develop and control the spontaneous formation of surfactant multilayer structures at interfaces; a potentially important structural motif for a wide range of technological applications. We propose to use NR and differently labelled surfactants to study the detailed evolution in surface structure of the anionic surfactant, sodium dodecyl oxyethylene sulphate, SLES, with increasing EO linker size from EO1 to EO3, in the presence of Al3+ counterions. The detailed structural information will provide an important insight into the formation and the development of the surface structures.