Abstract: There are provided panel assemblies (2) for forming building structures. A panel assembly (2) comprises a panel (3) and a first connector means for forming part of a connector assembly (1) for connecting the panel (3) to a body (5). Said connector assembly (1) comprises said first connector means, a second connector means, one or more securement members (30) and optionally a link member (200). The connector means are arranged such that in use they can be positioned in a connecting configuration in which a channel is defined. The channel having an opening on a facing side of the panel (3) for receiving securement members (30) which can be located to restrict relative movement of the panel (3) and body (5). Also provided are kits for forming building structures, building structures and methods of assembling structures.