Partially oxidised cellulose nanofibrils have recently been found to form gels in the presence of small amounts of salt or surfactant. As cellulose is a renewable, sustainable and biodegradable material, these gels are of interest as viscosity modifiers for aqueous formulations eg for personal care products, to replace less environmentally friendly materials. Our interest is to understanding the formation of these gels and their behaviour under shear which is important for future application in such formulations. This proposal is related to a proposal to study the static structures of these solutions (also in this proposal round). Here we wish to investigate the gel structures at low shear, and as they go through an observed shear thinning transition, by using the Couette shear cell available on the SANS instruments at ISIS.