We require beam time on NIMROD in order to complete and continue a previous experiment (RB1010046) on Laponite - water suspensions. We have succesfully performed the experiment on the lowest concentration sample (1.5% Laponite weight), showing the signatures of ageing at both low and intermediate Q. The beam time allocated was not long enough to follow tha ageing process of the highest concentration solution, which was supposed to reach the dynamical arrest within 12 hours, based on dynamic light scattering experiments. As a matter of fact we haven't seen clear signatures of ageing over the 2 days of measure on the 3% Laponite-water sample. Thus we propose to repeat the experiment on the 3% weight solution and require that the beam time is allocated in two slots.