Trident is in the news again, and will continue to generate heat in the run up to a parliamentary debate promised later this year on the programme and patrolling posture. But the outcome is clear, pre-determined in the minds of the political elite and to some extent in contractual and diplomatic commitments. For now. Could the equation change in the next parliament? The momentum behind the project appears unstoppable, but beware unexpected shocks before coming to a firm conclusion.