Adapted Astute subs a successor option

A REVIEW into alternatives to a Trident successor is likely to include the option of adapting Astute-class submarines to carry nuclear missiles putting it on “standby” and sending it out to sea at short notice.

The UK Ministry of Defence is reviewing the multi-billion replacement programme to appease Lib Dem coalition partners who oppose the like for like replacement, favoured by the Tories and Labour.

The plan preferred by the Lib Dems would see nuclear warheads fired from existing Astute submarines, eliminating the need to replace the Vanguard-class nuclear boats.

However, changing the submarines which carry the Trident missiles would require a new form of warhead, which could be judged to be an act of proliferation and therefore illegal under treaty obligations.

The study is likely to suggest a list of options and while some parts will not be published, a summary is expected early next year.

Supporters think an Astute submarines with nuclear weapons could be deployed within a week if there was a build-up of international tension, therefore negating the need for a new fleet of submarines.

But sceptics warn keeping the deterrent in harbour could mean the act of launching could heighten tensions at the worst possible time.

Barrow MP John Woodcock said: “Everyone will study any new evidence that emerges, but it is no surprise to see the Liberal Democrats peddling the same old idea which previous studies have suggested would actually be less cost effective and less likely to deter a future nuclear war.

“A government which continues to face both ways on the deterrent will be accused of putting politics ahead of national security.”

The idea of nuclear-tipped cruise missiles on adapted Astute-class submarines has been floated in the past but is thought to be more expensive and less effective.

The Astute submarines would need to be re-engineered and new war heads built, and less effective as cruise missiles are more likely to miss their target and are easier to shoot down.

Terry Spurling, of the Barrow Submariners Association, said: “One of the things that I would say is that this is not a new idea.

“It is certainly an option, but I am not sure what strategically the Americans would think of it.

“The successor would certainly give you more options though.”

A final decision on Trident replacement is not expected until after the next general election, but the initial gate stages of preparatory work have already been signed off.