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Trident

The hon. Member for Moray (Angus Robertson), who speaks for the Scot nationalists, made an important point that the Prime Minister rather dodged: that in the unlikely eventuality—heaven forfend—of an Scot nats majority in the Scottish Parliament, perhaps through a Liberal Democrat coalition, it is possible that we would face a non-nuclear Scotland. In which case, a submarine-based deterrent would not be possible. Has the Prime Minister thought about what alternative might be necessary under those circumstances?