Vladimir Putin has declared “martial law” on the four annexed regions of Donetsk, Luhansk, Kherson and Zaporizhzhia in the south-east of Ukraine.

Following the convening Security Council which is thought to have taken place in a secret nuclear bunker in a “remote” part of Russia Putin has authorised more wartime controls.

The Russian leader told the Security Council on Wednesday, “We are working on solving very complex, large-scale tasks to ensure a reliable future for Russia, the future of our people.

“We guarantee that this will be done with a guaranteed degree of reliability.

“Very recently, there has been a lot of disaffection with the order reigning in the armed forces but I have today issued a decree which rectifies that.”

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Putin added Moscow will allow a “big allocation from the budget for humanitarian assistance and also for training of personnel.”

Emergency meetings are also being held in Washington DC and the British Defence Minister Ben Wallace urgently left the UK on Tuesday after he was pulled out of the Commons to attend over “shared security concerns.”

On Tuesday RAF spy planes were in the Black Sea in “international airspace” escorted by “two typhoons” who were picking “up intelligence.”

Professor Michael Clarke, former director-general of the Royal United Services Institute told Sky News, that the RAF surveillance aircraft was “going up and down, doing figures of eight in international airspace.

“But those are the listening aircraft, those are the surveillance aircraft, and what it will have been doing, escorted by two typhoons flying shotgun with it, is just picking up all the intelligence from the battlespace.

“The fact that that’s what the RAF were doing yesterday tells us that the Ministry of Defence here expects there to be developments happening quite quickly.”

There are strong fears that Putin could be on the verge of using tactical nuclear weapons in the Black Sea to try and regain some sort of control in a warning shot to NATO and Western allies.

Analysts are also warning that Putin could use a nuclear weapon in the Black Sea in a show of force to threaten NATO and Western allies in an attempt for the them to back off and stop supporting Ukraine.

Speaking to The Sun a security source warned, “The threat has increased recently.”