A polytunnel bracket 20 comprises a first bracket member 32 pivotally attached to a second bracket member 34, wherein the first and second bracket members 32, 34 each define a passage 36 through which respective polytunnel cover support members can extend, in use. The brackets may be substantially identical to each other and the passages may be non-circular in cross-section. The members may each have respective clamp members (38, figure 4) associated therewith. A polytunnel structure incorporating such a bracket and used in the provision of a top vent is also described.
