This proposal is part of a broad collaboration between Oxford, CCLRC, and Unilever in the study of surfactants and mixed surfactants at interfaces and in solution. This is an entirely new theme to this programme and is an Industrial CASE project between Oxford and Unilever. The main objectives are to develop an understanding of the delivery of benefit actives (perfumes etc) to interfaces, of the impact of such actives on mixed surfactant microstructures and the stability of relevant formulations, and the development of new self-assembled structures for more optimal interfacial delivery. We request here SANS beam time on LOQ to progress the initial phase of this project, to investigate the impact of a range of synthetic perfumes of differing degrees of hydrophobicity (phenyl ethanol to linalool) on the self-assembly of LAS and LAS / nonionic surfactant mixtures.