The vote by Scottish Labour to scrap Britain's nuclear deterrent does not change the party's policy on the issue, shadow defence secretary Maria Eagle has said.

Ms Eagle insisted the party's policy remained, as it was at the general el ection, to acquire a like-for-like replacement for the ageing Trident submarine fleet.

She hinted that a review of Labour defence policy - which she is leading - was unlikely to be completed before a Commons vote on the issue which is expected next year.

Her comments came after party leader Jeremy Corbyn - a long-standing campaigner for nuclear disarmament - welcomed the overwhelming vote by the Scottish Labour Party conference against Trident renewal.

Ms Eagle - who like many Labour MPs supports the continuation of the deterrent - however said the vote was only one "input" into the policy-making process which ultimately would be set at the UK national level.

"This does not change our policy. Defence isn't a devolved matter so Labour Party policy has to be set at a national party level, at a UK level," she told BBC Radio 4's The World at One.

"Our policy is quite clear, it's as it was at the general election, it is in favour of procuring the successor submarines."

Ms Eagle said that her review would consider the issue of how a future Labour prime minister would operate the deterrent - even though Mr Corby had said that he would never authorise its use.

"I don't think that Jeremy was well-advised to answer that question in the way in which he did," she said.

"It is important that during our review we consider the issue of deterrence and how it operates and how our prime minister when we elect a Labour prime minister, needs to deal with that. That is going to be part of what we consider."

She made clear she would not be rushed into completing her review - leaving open the prospect that the party's official position will be unchanged when the Commons comes to vote on Trident renewal, even though Mr Corbyn is opposed.

"It has to be a serious review based on evidence and extensive consultation," Ms Eagle said. "We have not yet fixed a timetable but it won't be short."

The Scottish Labour vote was strongly criticised by unions representing defence workers.

Gary Smith, acting Scotland secretary for the GMB union, said workers, such as those at Faslane on the Clyde where the UK's nuclear submarine fleet is based, were "very disappointed" at the outcome.

"It is based on Alice-in-Wonderland politics promising pie-in-the-sky alternative jobs for workers who are vital to our national security," he said.

"GMB Scotland will not play politics on this and will stand up for our defence workers and their communities right across the UK."

Labour MSP Jackie Baillie, whose constituency includes the Faslane base, said some 13,000 jobs could be under threat if Trident is scrapped.

She put out a statement from the shop stewards at Faslane and Coulport saying they were "mystified" that the Unite union had been among those voting against Trident renewal.

The shop stewards, who represent Unite and GMB workers, said: "Unite policy clearly states that there is a need to preserve the jobs and skills of members and, until Unite receives firm commitments to this end, it will continue to support our members and their employment."