A fluid conduit interlock comprises 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.