Evolution of the properties of filament system 2 at five equally spaced times. Top left panel: Evolution of the total cold mass budget of the system (solid line) and position of the centre-of-mass of the system (dashed line) as a function of time. Top right panel: Distribution of the radial velocity for various times, along with their associated median values (dashed line). The shaded grey area represents the positive radial velocity region. Lower left panel: Mass distribution of the clumps at various times. Lower right panel: Distribution of the plasma, β, at various times and associated median values (dashed line). The number, N, in the top right panel indicates the number of clumps found at each time, with and without (in parentheses) the constraint on the minimum number of cells (ten) for a clump to be included in the sample.