An umbrella hub (116; 120; 124) comprising: an aperture configured to be disposed about an umbrella pole; an upper portion including a top surface extending between the aperture and an outer periphery of the hub; a lower portion including a bottom surface extending between the aperture and the outer periphery of the hub; a first engagement position configured to permit insertion of end portions (108A, 108C) of umbrella structural members into the hub, the first engagement position being provided by first relative movement of the upper and lower portions of the hub along an axis extending through the aperture; a second engagement position configured to retain end portions (108A, 108C) of umbrella structural members within the hub, the second engagement position being provided by second relative movement of the upper and lower portions of the hub along an axis extending through the aperture; wherein a first locking protrusion is provided on the upper portion of the hub to engage with a first locking recess on the lower portion of the hub; and wherein the first locking protrusion comprises a hook disposed on the upper portion of the hub and projecting below a lower surface of the upper portion to a lateral portion, and the first locking recess is disposed on the lower portion of the hub and is configured to receive the lateral portion of the hook in one of the first and second engagement positions; characterised in that the first locking recess comprises a first lateral recess being located at a first elevation of the lower portion of the hub and a second lateral recess being located at a second elevation of the lower hub, the first elevation being disposed between the second elevation and the lower surface of the upper portion of the hub when the hub is assembled. an aperture configured to be disposed about an umbrella pole; an upper portion including a top surface extending between the aperture and an outer periphery of the hub; a lower portion including a bottom surface extending between the aperture and the outer periphery of the hub; a first engagement position configured to permit insertion of end portions (108A, 108C) of umbrella structural members into the hub, the first engagement position being provided by first relative movement of the upper and lower portions of the hub along an axis extending through the aperture; a second engagement position configured to retain end portions (108A, 108C) of umbrella structural members within the hub, the second engagement position being provided by second relative movement of the upper and lower portions of the hub along an axis extending through the aperture; wherein a first locking protrusion is provided on the upper portion of the hub to engage with a first locking recess on the lower portion of the hub; and wherein the first locking protrusion comprises a hook disposed on the upper portion of the hub and projecting below a lower surface of the upper portion to a lateral portion, and the first locking recess is disposed on the lower portion of the hub and is configured to receive the lateral portion of the hook in one of the first and second engagement positions; characterised in that the first locking recess comprises a first lateral recess being located at a first elevation of the lower portion of the hub and a second lateral recess being located at a second elevation of the lower hub, the first elevation being disposed between the second elevation and the lower surface of the upper portion of the hub when the hub is assembled.