Renewing Britain's nuclear deterrent system will speed up Scotland becoming an independent country, the SNP's Angus Robertson has warned.
The SNP's Westminster leader said the Scottish people are being ignored by the UK Government, as he reminded MPs renewing Trident is not what constituents want.
Mr Robertson claimed Trident is an an "immoral, obscene and redundant weapons system" in his speech ahead of MPs voting on renewing Trident, which led to applause and cheers by his colleagues in the House of Commons.
He said the party had repeatedly won elections on its "explicitly anti-Trident manifesto".
The people of Scotland have shown repeatedly, clearly and consistently that we are opposed to the renewal of nuclear weapons.
If Scotland is a nation, and Scotland is a nation, it is not a normal situation for the state to totally disregard the wishes of the people, and this Government has a democratic deficit in Scotland, and with today's vote on Trident it's going to get worse, not better.
It will be for the Scottish people to determine whether we are properly protected in Europe and better represented by a Government that we actually elect - at this rate, that day is fast approaching.
The Labour leader Jeremy Corbyn has questioned the effectiveness of Trident, as MPs prepare to vote on renewal of Britain's nuclear deterrent.
Speaking in the Commons, he said: "What is the threat that we are facing that over a million people's deaths actually deters?
"It's not from the so-called Islamic State - their poisonous death cult glories in killing as many people as possible, as we've seen brutally in Syria, to east Africa, from France to Turkey.
"It hasn't deterred our ally, Saudi Arabia, from committing dreadful acts in the Yemen. It didn't stop Saddam Hussein's atrocities in the 1980s or the invasion of Kuwait in 1990. It didn't deter the war crimes in the Balkans in the 1990s, nor the genocide in Rwanda.
"I do not believe the threat of mass murder is a legitimate to go about dealing with international relations."
Theresa May accused Green MP Caroline Lucas and some Labour MPs of defending the country's enemies, as MPs prepare to vote on renewing Trident.
The MP for Brighton Pavilion had said the UK's nuclear weapons are "driving proliferation - not the opposite", before the prime minister rejected the suggestion, saying: "I have to say to you that sadly you and some members of the Labour Party seem to be the first to defend the country's enemies and the last to actually accept the capabilities that we need."
Mrs May said it is "a great pity" that members of the Labour front bench "fail to see the necessity" of Britain's nuclear deterrent "given that the Labour party in the past has put the British national interest first in looking at this issue."
Speaking in the Commons, the prime minister added that we "cannot afford to relax our guard" and "need to be prepared to deter threats to our lives and our livelihoods."
Theresa May has said it would "quite wrong" not to renew Trident, which she described as an "essential part" of our national security and the "ultimate insurance" against nuclear attack.
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MPs are set to vote on Monday evening whether or not to renew Britain's £40 billion Trident nuclear deterrent.Read the full story ›
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Labour shadow minister Chuka Umunna has said there is “tension” between the Labour party membership and the parliamentary party under the leadership of Jeremy Corbyn.
Speaking on ITV's The Agenda, he acknowledged that Mr Corbyn has enthused many party members.
However, he said the party's MPs - some of whom are markedly more centrist than their leader - represent a much larger section of the electorate.
If you look at the research on things like Trident, the parliamentary party would be closer to the views of the voters than the members and there's that tension.
Mr Umunna, who previously stood for the party leadership, also refused to rule out running again.
"I would said I would never say never," he said, while adding that at the moment the question did not arise as there is no vacancy.
Watch in full on The Agenda on ITV at 10.40pm tonight.