A locking tube clip for use with a tube, the locking tube clip comprising: a body engageable with one or more external surface recesses of the tube, an internal surface of the body including at least one first projection (7, 20, 50), and at least one second projection (7, 22, 51), and a pair of jaws extending from the body for gripping an item, wherein, in use, in a first orientation of the body relative to the tube, the locking tube clip is movable along a length of the tube, and in a second orientation of the body relative to the tube, the locking tube clip is resistive to movement along a length of the tube, wherein in the first orientation the locking tube clip is in a plane such that the body is substantially co-axial with the tube, and in the second orientation the locking tube clip is in a plane such that the body is substantially non co-axial with the tube, wherein in the first orientation, the at least one first projection (7, 20, 50) is engageable with a first external surface recess of the tube, and the at least one second projection (7, 22, 51) is engageable with the same or another external surface recess of the tube located near the first external surface recess in which the at least one first projection is engageable, and wherein in the second orientation, the at least one first projection (7, 20, 50) and the at least one second projection (7, 22, 51) are engageable with an external surface recess or recesses of the tube, the external surface recess or recesses engaged by the at least one first projection (7, 20, 50) is separated from the external surface recess or recesses engaged by the at least one second projection by a distance along a length of the tube, such that, in use, when the locking tube clip is oriented from the first orientation to the second orientation, the at least one first projection (7, 20, 50) and at least one second projection (7, 22, 51) act on the tube, or said engaged external recess or recesses or a part thereof, to restrain the locking tube clip from being moved between external surface recesses or along a length of the tube. a body engageable with one or more external surface recesses of the tube, an internal surface of the body including at least one first projection (7, 20, 50), and at least one second projection (7, 22, 51), and a pair of jaws extending from the body for gripping an item, wherein, in use, in a first orientation of the body relative to the tube, the locking tube clip is movable along a length of the tube, and in a second orientation of the body relative to the tube, the locking tube clip is resistive to movement along a length of the tube, wherein in the first orientation the locking tube clip is in a plane such that the body is substantially co-axial with the tube, and in the second orientation the locking tube clip is in a plane such that the body is substantially non co-axial with the tube, wherein in the first orientation, the at least one first projection (7, 20, 50) is engageable with a first external surface recess of the tube, and the at least one second projection (7, 22, 51) is engageable with the same or another external surface recess of the tube located near the first external surface recess in which the at least one first projection is engageable, and wherein in the second orientation, the at least one first projection (7, 20, 50) and the at least one second projection (7, 22, 51) are engageable with an external surface recess or recesses of the tube, the external surface recess or recesses engaged by the at least one first projection (7, 20, 50) is separated from the external surface recess or recesses engaged by the at least one second projection by a distance along a length of the tube, such that, in use, when the locking tube clip is oriented from the first orientation to the second orientation, the at least one first projection (7, 20, 50) and at least one second projection (7, 22, 51) act on the tube, or said engaged external recess or recesses or a part thereof, to restrain the locking tube clip from being moved between external surface recesses or along a length of the tube.