Kelly So who is the biggest threat?

and ex-deputy commanding chief of UK land forces Sir Hugh Beach have said Trident is not a deterrent against foreign aggression).

Much more worryingly, Fallon also said: “In the most extreme circumstances, we have made it very clear that you can’t rule out the use of nuclear weapons as a first strike.”

Once you say you’re prepared to unleash Trident even if the UK isn’t under direct threat, countries which think they are in the firing line get a bit jittery.

And one of those country’s is Russia which has a nuclear capability of its own.

After Fallon’s comments, Russian parliamentarian Frants Klintsevich, first deputy chairman of the defence committee in Russia’s upper house of parliament, the Federation Council, asked: “Against whom is Great Britain going to preemptively use nuclear weapons?” He also said Britain’s threat “deserves a tough answer.”

His question was answered in an opinion piece by a writer for the Russian state-funded Sputnik news agency - seen as a government mouthpiece.

It read: “At least one of Britain’s nuclear submarines is now on permanent combat patrol in the Arctic. I guess it is not the best way to protect the freedom and security of an island nation located 3,000 kilometres off the Barents Sea. However, the British media are full of optimism and leave practically no doubt that the main target of the British submariners is Russia.”

Mr Klintsevich also said if Britain were to launch a preemptive strike, then “not having the biggest territory, it will literally be erased from the face of the earth.”

So who is the biggest threat to Britain’s security - Corbyn or Fallon? Defence Secretary Sir Michael Fallon