The SNP have secured a debate on Trident safety at Westminster next week in the wake of allegations of safety lapses in the UK's nuclear deterrent programme.

SNP Foreign Affairs spokesman Alex Salmond said that the move would "keep the pressure on" David Cameron's government over the claims.

First Minister Nicola Sturgeon has demanded a "top-level" inquiry into allegations made about the security and safety of the Trident programme which were made by a whistleblower and came to light at the weekend.

Able Seaman William McNeilly, 25, went absent without leave last week after producing an 18-page report.

The document detailed what he said were 30 safety and security flaws on the Trident submarines based at Faslane on the Clyde, which he described as a ''disaster waiting to happen'.

He was stopped at Edinburgh Airport on Monday and is being held by Royal Navy Police at a military establishment in Scotland.

The Royal Navy said it is "continuing to investigate the circumstances" of the report.

Mr Salmond said that the SNP would place pressure on Conservative ministers until "we are satisfied that not only have they have investigated Mr. McNeilly's claims thoroughly and have acted on the findings but that those findings are put into the public domain.

"It is bad enough that Scotland is forced to house these weapons of mass destruction," he added, "but these alleged breaches of security are deeply worrying - there must be absolutely no complacency."

New SNP defence spokesman Brendan O'Hara said: "We insist that the MoD make a formal statement on this matter at the earliest opportunity."

At First Minister's Questions, Ms Sturgeon said that the allegations were "gravely concerning".

She added: "Public safety must always be the top priority. I do think we need a top-level inquiry into the allegations that have been made...

I think only the fullest possible assurance from the UK Government of the safety of its arrangements is acceptable."

A Royal Navy spokesman said: "The Royal Navy would like to reiterate that we take the operation of our submarines and the safety of our personnel extremely seriously.

"We continue to fully investigate the circumstances of this issue and ministers will update Parliament at the earliest opportunity."

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