Prime Minister Sir Keir Starmer has urged the SNP to back down over its calls to scrap the country's independent nuclear deterrent - branding the stance "completely wrong-headed".
Starmer's comments come after First Minister John Swinney last week reiterated his party's position in opposition of Trident, based on the Clyde.
Responding on the topic in the Commons, the prime minister said it was not the time to "reduce our security or defence".
The Telegraph reports Starmer urged the SNP to reconsider its opposition to nuclear weaponry in light of Donald Trump's threats to withdraw US military support in Europe.
Last week, Swinney argued Trident was "providing no tangible or realistic benefit to the military challenges that we face at this moment".
Speaking in the Commons, Starmer said: “I was somewhat concerned that the SNP is continuing its suggestion that now is the time to abandon the nuclear deterrent.
“If ever there was a time to reaffirm support for the nuclear deterrent, it is now. We must not reduce our security and defence. I think it is a completely wrong-headed decision and they should reconsider.”