A portable anchor for use on a roof (26), the anchor comprising a force distribution member (12) and connection means (13) for receiving a load support line (28) wherein the connection means is positioned around the junction between the attachment member and the force distribution member (12 ). The attachment member (11) is preferably an elongate arrangement with a gap between a first side structure and a second side structure in the form of a clamping arrangement. The gap is dimensioned to receive an edge (25) of the roof and preferably has a stop member (15) positionable against an edge of t he roof cladding. The force distribution member (12) is preferably dimensioned and configured to mate with corrugations (27) or other indentations in the roof to resist lateral displacement. The connection means (13) is positioned towards the junction of the arm and the longate member to resist the tendenc y for lateral rotation and displacement of the roof anchor as a harnessed work er moves laterally on the roof. The clamping means is preferably formed from tw o clamping arrangements (16, 17) such as cammed catches or threaded bolts.</SD OAB>
