AbstractThe interdependence of the world is a cause of concern in the field of national security. For technological reasons it seems as though it is inevitable. Self-sufficiency in key technologies should be a goal to which the British government should strive, not merely in the interests of the defence of the nation but in those areas where there is the potential for dual-use technologies to assist both civil and military product competitiveness in the international market. Britain must be able to bring something to negotiations with her European partners.