A gate fastener for securing a double gate (24, 26), comprising: a pivotable body that is fixable (e.g., using a screw) to a first gate, wherein the pivotable body comprises at least one recess for receiving a gate rail on a second gate; wherein the pivotable body comprises a locking pin and at least one aperture on a side of the pivotable body, the aperture retaining the locking pin, such that the locking pin is integrated within the pivotable body; and wherein (a) in a first position, the locking pin spans the recess and prevents movement of the gate rail out of the recess, and (b) in a second position, the locking pin is retracted from the recess such that a portion thereof is retained within the pivotable body without preventing movement of the gate rail out of the recess, characterised in that one or more of the apertures in the pivotable body have a wide portion and a narrow portion, with only the wide portion permitting movement of the locking pin between the first and second positions, and wherein the locking pin comprises a neck that is of smaller diameter than its main body, and wherein the neck is of a diameter that is smaller than the diameter of the narrow portion of the one or more apertures in the pivotable body, such that it slots into the narrow portion, and wherein the main body is of a diameter that is larger than the diameter of the narrow portion but of a diameter than is smaller than the diameter of the wide portion of the one or more apertures in the pivotable body, such that the locking pin is secured in the narrow portion. a pivotable body that is fixable (e.g., using a screw) to a first gate, wherein the pivotable body comprises at least one recess for receiving a gate rail on a second gate; wherein the pivotable body comprises a locking pin and at least one aperture on a side of the pivotable body, the aperture retaining the locking pin, such that the locking pin is integrated within the pivotable body; and wherein (a) in a first position, the locking pin spans the recess and prevents movement of the gate rail out of the recess, and (b) in a second position, the locking pin is retracted from the recess such that a portion thereof is retained within the pivotable body without preventing movement of the gate rail out of the recess, (a) in a first position, the locking pin spans the recess and prevents movement of the gate rail out of the recess, and (b) in a second position, the locking pin is retracted from the recess such that a portion thereof is retained within the pivotable body without preventing movement of the gate rail out of the recess, characterised in that one or more of the apertures in the pivotable body have a wide portion and a narrow portion, with only the wide portion permitting movement of the locking pin between the first and second positions, and wherein the locking pin comprises a neck that is of smaller diameter than its main body, and wherein the neck is of a diameter that is smaller than the diameter of the narrow portion of the one or more apertures in the pivotable body, such that it slots into the narrow portion, and wherein the main body is of a diameter that is larger than the diameter of the narrow portion but of a diameter than is smaller than the diameter of the wide portion of the one or more apertures in the pivotable body, such that the locking pin is secured in the narrow portion.