Fraction of galaxies of each morphology as a function of σ_cl (left) and X-ray luminosity (L_X; right). Filled grey symbols indicate the clusters in the post-merger cluster sample. The solid coloured and black lines denote the average fractions in the post-merger and control cluster samples, respectively, with errors represented by the corresponding dashed lines. The cluster mergers have the same average fraction of spirals as the seven relaxed clusters, where the average is dominated by the scatter in the fractions.