A Scottish peer has become only the second former defence secretary ever to argue the UK does not need its nuclear deterrent at sea around the clock.
Lord Browne of Ladyton warned the position – a cornerstone of the current Trident system based on the Clyde – could actually reduce Britain's safety.
The Liberal Democrats are arguing for a scaled-back deterrent.
But Labour says it backs a like-for-like replacement of the ageing submarines.
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