This work proposes one of our first oil/water interface measurements in collaboration with Dr Ali Zarbakhsh at Queen Mary College London and Dr John Webster at ISIS Neutron Facility. Globular proteins such as lysozyme and serum albumins (BSA and HSA) have been extensively studied by neutron reflection at air/water and solid/water interfaces in our previous work. They will be used here to sample the main O/W interfacial features, thereby helping developing the new experimental capability. The aims of this study are to demonstrate technical feasibility and furthermore, to make the basic comparison of layer structures to be obtained from the O/W interface with those already obtained from the air/water and solid/water interfaces. This will then enable us to understand the role of the oil.