An observational case-study is presented of a rapidly developing UK cyclone on 30 October 2000 to reveal the rich diversity of coexisting mesoscale structures in the vicinity of the cloud head, dry slot and polar-front cloud band. The mesoscale structures include: multiple rain bands, due to upright convection originating in the boundary layer; stacked slantwise convective circulations at middle levels; cloud-top striations, due to upright convection originating at high levels above the polar-front cloud band; multiple sub-structure within the cloud head; and inertia-gravity waves in the region of the tropopause fold. The emphasis of the analysis (synthesis) is on the inter-relationships between the various mesoscale structures. Issues raised by this study include: (i) the interaction between upright and slantwise convection, including the effects of evaporation in the dry slot; (ii) the possible roles of inertia-gravity waves and conditional symmetric instability in triggering/organizing the dry-slot convective rain bands and the sub-structure within the cloud head; and (iii) the relationship between the dryslot rain bands and the multiple structures within the cloud head. This study is limited to documenting these relationships; controlled experiments with high-resolution mesoscale models will be required to establish cause and effect and to assess their importance.