Anchorage systems and devices

Anchorage device, for use in an anchorage system with a track having an upwardly-open longitudinal channel with a top channel opening defined between opposed overhanging lips, the top channel opening having a series of periodic cut-outs;

• the anchorage device having a longitudinal axis and having one or more slidable foot portions each comprising a laterally-enlarged bottom part dimensioned to be insertable into the top channel opening of the track channel at a said cut-out thereof when at a removal/insertion position relative to the track, and which when slid along away from the cut-out is held captive beneath the overhanging lips of the track at a captive position relative to the track;
• the anchorage device further comprising a releasable locking mechanism for releasably locking the device longitudinally in position relative to the track in use, whereby a said slidable foot portion cannot slide from the captive position to a removal/insertion position aligned with a cut-out;
• and wherein an upwardly-directed surface of at least one said slidable foot portion, being a top surface of the lateral enlargement thereof which in the captive position of the anchorage device is opposed to the underside of a track lip, is longitudinally inclined relative to the longitudinal axis of the device.