A fluid conduit interlock comprising: at least one retention member for engaging a fluid conduit, the or each retention member configured to be movable between a retention position for retaining the fluid conduit and a release position for releasing the fluid conduit; a valve member configured to be movable between a valve open position for opening a hollow bore and a valve closed position for closing the hollow bore; and an interlock mechanism configured to operably link the movement of the or each retention member and the movement of the valve member so that the or each retention member in the release position locks the valve member in the valve closed position and so that the valve member in the valve open position locks the or each retention member in the retention position, characterised in that the interlock mechanism includes at least one first interlock member and a second interlock member, the second interlock member movable between first and second positions, wherein the movement of the second interlock member is operably linked to the movement of the valve member so that the second interlock member is in a first position when the valve member is in the valve closed position and so that the second interlock member is in a second position when the valve member is in the valve open position, wherein the or each retention member is configured to be movable from the retention position to the release position to displace the respective first interlock member into engagement with the second interlock member so as to lock the second interlock member in the first position, wherein the second interlock member in the second position is configured to prevent the displacement of the or the respective first interlock member into engagement with the second interlock member so as to prevent the movement of the or each retention member from the retention position to the release position. at least one retention member for engaging a fluid conduit, the or each retention member configured to be movable between a retention position for retaining the fluid conduit and a release position for releasing the fluid conduit; a valve member configured to be movable between a valve open position for opening a hollow bore and a valve closed position for closing the hollow bore; and an interlock mechanism configured to operably link the movement of the or each retention member and the movement of the valve member so that the or each retention member in the release position locks the valve member in the valve closed position and so that the valve member in the valve open position locks the or each retention member in the retention position, characterised in that the interlock mechanism includes at least one first interlock member and a second interlock member, the second interlock member movable between first and second positions, wherein the movement of the second interlock member is operably linked to the movement of the valve member so that the second interlock member is in a first position when the valve member is in the valve closed position and so that the second interlock member is in a second position when the valve member is in the valve open position, wherein the or each retention member is configured to be movable from the retention position to the release position to displace the respective first interlock member into engagement with the second interlock member so as to lock the second interlock member in the first position, wherein the second interlock member in the second position is configured to prevent the displacement of the or the respective first interlock member into engagement with the second interlock member so as to prevent the movement of the or each retention member from the retention position to the release position.