One important structural application of oxide glasses is for nuclear waste immobilisation. Recent reports have highlighted the possibility of iron phosphate glasses as an alternative to borosilicate glasses. There is still a large gap between the academic and technological interest in iron phosphate glasses because the glasses developed for nuclear waste immobilisation have soda as a major component, to dissolve waste. Hence it is important to extend academic studies to sodium iron phosphate glasses. This provides the motivation for the current proposal to carry out neutron diffraction on sodium iron phosphate glasses. The data will be used firstly by analysing the total pair distribution functions T(r) using peak fitting to extract short range order parameters, and secondly for comparison of structure factors S(Q) to validate MD models.