The invention provides a structured aqueous surfactant system comprising: a) at least 0.1 wt% nonionic surfactant which is a polyoxyethylene nonionic surfactant having a hydrophilic head group with at least four oxyethylene units b) from 0.5 to 5 wt% dispersed modified cellulose biopolymer wherein the modification consists of the cellulose having its C6 primary alcohols oxidised to carboxyl moieties (acid/COOH ) on 10 to 70% of the glucose units and substantially all the remainder of the C6 positions occupied by unmodified primary alcohols c) from 0 to 10 wt% non surfactant electrolyte and d) water.
