There is provided a fence post having a web and locating elements for engagement with an end portion of a barrier panel. The web has opposite inner and outer surfaces, and is profiled to facilitate alignment of the fence post with another said post when those posts are arranged back to back with the outer surfaces of the webs in abutting relation. The web incorporates at least one longitudinal groove that in use provides a channel between the abutting webs of fence posts for drainage of water from between the posts. There is also provided an intermediate fence post assembly having two of the posts arranged back to back with their respective webs in abutting relation, as well as a fence incorporating a plurality of the fence posts and/or fence post assemblies.