A collapsible barrier (10) comprises: a first pair of members (12,14) pivotally coupled together at a first coupling (16); and a second pair of members (18, 20) pivotally coupled together at a second coupling (22); wherein each member (12, 14) of the first pair is pivotally coupled at a respective lateral coupling (24, 26) to a corresponding member (18, 20) of the second pair such that the members (12, 14, 18, 20) are movable from an erected configuration where the members of the first pair are mutually inclined at a first angular separation, and a collapsed configuration where the members of the first pair are mutually inclined at a second angular separation which is less than the first angular separation.