We want to better understand the intermolecular interactions in deuterated triglycine sulphate (DTGS). DTGS is a hydrogen bonded ferroelectric with a second-order, order disorder phase transition at 335K. Above the critical temperature, one of the glycine molecules is disordered across a mirror plane and below the critical temperature, it chooses a side, breaking the symmetry. The ferroelectric state is obtained through the ordering of the glycine orientations on neighbouring sites, but the mechanism for the phase transition is not well understood. To gain insight the behaviour of the disordered glycine, we need to investigate the short range order in DTGS at temperature from well above to well below the phase transition. We previously collected diffuse scattering data from DTGS on SXD at T>Tc.