Nicola Sturgeon has accused the UK Government of "playing games" over Trident, ahead of MPs voting on the renewal of the nuclear deterrent.
Scotland's First Minister also said it would be "unforgivable" if the Labour Party were to split over the vote in the Commons, and urged the party's Mps to reject the nuclear weapons system.
The majority of Labour MPs are expected to vote in favour of renewing the nuclear deterrent. But leader Jeremy Corbyn and a number of other left-wing MPs in the party are opposed to the motion, while some are expected to abstain in the vote.
The SNP's 54 MPs will vote against the renewal of Trident at Faslane on the Clyde, having earlier called for the vote to be delayed.