Tory leader Ruth Davidson has vowed to stand "shoulder to shoulder" with Labour members and trade unionists who want the UK to retain its Trident nuclear deterrent.

The Scottish Conservative chief spoke out as the GMB union put forward a motion backing the renewal of the weapons system to the Scottish Trades Union Congress (STUC) annual congress in Dundee.

While Scottish Labour voted against renewing Trident at its conference last year, the GMB motion warns a "failure to progress the Trident successor programme will have devastating consequences" for jobs and could see local economies "decimated".

The motion states scrapping Trident, which is based at Faslane on the Clyde, would mean "prosperity and hope of a better future will fade away, replaced by low wages, zero hours contracts and a spiral into poverty".

"This is not a future any self-respecting trade union should contemplate supporting for decent hard-working people."

Ms Davidson said: "I have met and listened to many traditional Labour supporters who see the common sense in renewing Trident. They are worried about the direction the party is now taking.

"My message to them is that me and my team will stand shoulder to shoulder with you on this issue.

"Together we can make the case for preserving Britain's security and for protecting thousands of Scottish jobs."

While she said Labour supporters "used to be able to trust their party on this", she said they were now in a "total mess" on Trident.

While Ms Davidson made clear Tory support for Trident, SNP leader Nicola Sturgeon was focused on what her party could offer Scotland's youngest citizens.

The SNP has announced plans to offer a baby box full of essentials, costing £100, to the parents of every new-born baby.

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The boxes are based on a similar scheme in Finland which has helped cut the infant death rate and will include clothes, some toys and books and bedding, so the box itself can be used as a cot.

The initiative will cost an estimated £6 million a year but Ms Sturgeon, who was campaigning in Glasgow, said: "I am determined that every child born in Scotland gets the very best start in life and have made clear my ambition that all children should have the same chance to fulfil their potential.

"That process should start before a baby is even born. At the heart of the baby box is a message about fairness and opportunity that is also at the heart of our manifesto.

"We pledge to provide all families with the essentials that every child needs over the first weeks and months of life."

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She continued: "The baby box - as well as a practical support package for newly-born children - has been shown in other countries to encourage expectant mothers to take up ante-natal care at an earlier stage, contributing to reduced infant mortality and lower stillbirth rates.

"While the Tories have trashed support for new mums and dads on low incomes, we're reversing these cuts and expanding support which would see a family with two children over early years receive £1,900.

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"Alongside the material and financial support we will deliver, it is important that parents get advice when they need it - and we'll recruit 500 new health visitors by 2018 to better-support Scotland's families and further extend the family nurse partnership, which supports some of our youngest and most vulnerable parents."