Abstract: A fencing system comprises a plurality of posts, a plurality of runners for interconnecting the posts and pickets extending vertically relative to the horizontal runners. The pickets, runners and posts are formed from moulded plastics material. The post includes a plurality of slots in outer faces thereof each slot having a transverse pin arranged centrally thereof for receiving a hook member at a respective end of a runner. In addition the posts include M-shaped notches at corners thereof for receiving a wire extending past the post and supported thereby. A lower end of the post includes a transverse surface which converges to an apex to prevent frost heave.