Line ratio diagnostic diagrams, showing line ratios for independent spaxels in NGC 4676B. Those spaxels which lie in the bicones are coloured orange, the remainder of the spaxels are included as blue circles. Line ratios in some key regions of interest are shown as yellow symbols (see Fig. 2). Overplotted as black lines are empirically and theoretically derived separations between LINERs/Seyferts and H ii regions, as given in Fig. 9. Overplotted as coloured lines are AGN photoionisation model predictions by Groves et al. (2004).