This proposal is part of a funded (CASE) project, aimed at understanding the delivery of benefit actives (perfumes) to interfaces and the development of new self-assembled structures for more optimal interfacial delivery and retention. We have made good progress in characterising, using NR, and understanding the co-adsorption at the air-water interface of the anionic surfactant LAS with 2 synthetic perfumes of differing degrees of hydrophobicity (phenyl ethanol and linalool) in monolayer and multilayer surface structures. Following some initial preliminary measurements on exploiting the strong surface interaction between polyelectrolytes and surfactants for perfume delivery we now wish to extend those studies to explore in more detail the role and mechanisms associated with polyelectrolyte / surfactant / perfume mixtures.