Ladder safety mechanisms

A ladder safety mechanism comprising:

• two clamps, each clamp attachable part way along a separate rail of a pair of spaced apart rails of a ladder, each clamp comprising a pair of spaced apart jaws to hook over a part of a structure and at least one claw arm pivotally mounted to a housing of the clamp, each at least one claw arm closable to secure the part of the structure between the jaws to secure the ladder to the part of the structure;
• at least one manually operated actuator coupled to the at least one claw arm of each clamp to enable a user located at the bottom of the ladder to open each clamp to release the part of the structure from between the jaws;
• and
• a pair of tracks removably attachable to the ladder wherein each clamp is slidable along a respective track of the pair of tracks;
• wherein the at least one claw arm of each clamp is also pivotally mounted to a respective slider block movable within the housing of the respective clamp;
• and
• wherein contact of the part of the structure with the respective slider block pushes the respective slider block upwards and causes pivoting of the at least one respective claw arm relative to the respective slider block and relative to the housing as the at least one respective claw arm closes.