The cost of replacing a fleet of nuclear missile submarines has reached almost £5 billion, according to critics, and could soar to £40 billion.

It comes at a time when the U.K. government, led by Prime Minister David Cameron, is pushing through swathes of austerity measures to reduce spending, and Coleman is convinced the money earmarked for the Trident program should have been diverted to the country's National Health Service (NHS) budget.

He tells Q magazine, "With that money, we could revamp the NHS, but instead we're spending it on weapons of mass destruction we can't even use - the Americans have to give us permission to use Trident."