SNP MPs will join Plaid Cymru and the Greens at Westminster tomorrow to demand that the “morally repugnant” Trident nuclear weapons system is scrapped.

The Scottish National Party will put the issue at the heart of its single annual opposition debate in the Commons.

“Nuclear weapons are financially stupid and morally repugnant,” said SNP Westminster leader and defence spokesman Angus Robertson.

“We have to stop wasting tens of billions of pounds on nuclear weapons — particularly at a time when Tory cuts mean that many families can’t afford to put food on the table — and this debate is a step in the process of getting rid of Trident for good.”

Scottish CND secretary Alan Mackinnon told the Morning Star that he welcomed the opportunity for anti-Trident MPs to hold the government to account over the nuclear weapons.

“Up to £3.3 billion of taxpayers’ money is likely to be spent on so-called long-lead items prior to the ‘main gate’ decision in 2016,” he said.

“This demands proper parliamentary scrutiny and many Labour MPs and some Liberal Democrats will want to join with SNP, Green and Plaid MPs to challenge this waste of resources at a time when working people are facing savage austerity.”

Mr Robertson believes the general election will be a “massive opportunity” to stop the renewal of the Trident weapons programme.

“A strong group of SNP MPs at Westminster will oppose a new generation of nuclear weapons being dumped on the Clyde,” he said.