Thousands of panicked Brits are rushing to buy up defunct nuclear bunkers as Putin threatens the West.
The Kremlin leader has continually threatened Western powers since the beginning of the conflict in Ukraine, warning he would be prepared to use nuclear weapons to defend Russian sovereignty.
One top property-seller says he has received more than three calls a day since the war started - all looking for somewhere to bunk down.
Russ McLean, who set up Unique Property Bulletin in 1987, claims to have fielded more than 3,300 calls, emails and texts from Brits terrified by what Putin might do.
Mr McLean, who served in the police and the Merchant Navy, said: "It bothered me. I was almost in tears and losing my bearings at times.
"It is not a small number - there is a huge national distress of people that are worried.
"Now in Britain people are either building it or when these things come up - your click rate goes through the roof."
There are more than 1,500 ROC Nuclear Monitoring Posts across the UK.
Officers stationed at the posts would forecast which areas would be in danger from nuclear fall out in the case of a nuclear attack.
To give fall out protection they were built underground, and many remain intact nearly 70 years on from when they were first commissioned in 1955.
No telephone was provided, but the posts had a Warning receiver to know when to sound the hand operated siren, and the master post in each area had a radio for a backup to the landline intercom device.
The 63-year-old continued: "There are seven bunkers we have sold in the past 10 years.
"When Putin invaded our clucks started going up significantly and noticeably in the two weeks that they invaded.
"They have never really come back down.
"My phone goes at least twice a day where you have a conversation with someone about nuclear bunkers.
"I get at least two a day - it averages at three and you can add another thousand on for good measure.
"That's phone calls - that's not emails, that's not texts, so you can double that figure."
Unique Property Bulletin are currently advertising a ROC Nuclear Monitoring Post in Quadring Eaudyke, near Peterborough, for £28,000.
Bought by Phillip Frostick, 56, and pal Ian when he was 27 in 1993 after it was spotted by his friend's dad in a newspaper.
Lived in Saffron Walden, North Essex - 80 miles and an hour and a half's car journey from the bunker.
Bought it with big plans - but these fell through when they realised the full extent of the cost and effort it would have taken to do it up.
And while it lay abandoned for thirty years, it was broken into, trashed and burned - with valuables lost including an award won for keeping the best kept bunker.
It was first opened in 1963 and was sold on in 1991 - alongside nearly all of the other bunkers.
But Phillip believes that it could take just a few weekends of hard work to bring it back to fighting shape.
"At the time it was really bought as a bit of a folly, but we never knew what it might become.
"We thought we could do great things with it - and over the years I can't lie and say that I've never dropped it into conversation.
"At the back of my mind it's not getting better - hopefully there will be a club or a history buff that has got a bit more enthusiasm and energy than I have to bring it back to what it would be like.
"The damage is really frustrating because if someone had broken in and used it as a club house and looked after it I really wouldn't have had a problem.
"But I really don't understand vandalism for the sake of vandalism.
"As a piece of history to bring it back to its former glory I think it'll be right up someone's street."
In May a cold war bunker was put up for grabs on Rightmove for £18,000 - despite having no water, gas or electricity.
The nuclear observation station was once manned by the Royal Observation Corps.
It is said to have "open countryside views" and "road frontage and access."
The "internal accommodation", which is 20ft (six metres) underground, is described as "very primitive."
Due to safety reasons, prospective buyers will not actually be able to go inside the bunker in Pontefract, West Yorks, to have a look.
The listing, put up by The County Property Auction, says: "The internal accommodation comprises a locked entrance hatch which leads to a 20ft vertical ladder down to an underground chamber.
"This room would have housed the observers, their instruments and welfare facilities.
"There is also a smaller room which would have housed a chemical toilet.
"Conditions were very primitive, there was no running water, gas or mains electricity."
The property can only be viewed on foot and in daylight hours.
Due to safety reasons, prospective buyers will not actually be able to go inside the bunker to have a look.
The only access to the outside world for volunteers of the Royal Observation Corps would have been a loudspeaker intercom, connected to the UK Warning and Monitoring Organisation HQ.
Ryan Gibson, a marketing consultant from Wakefield, called it an "interesting residential development opportunity."
Max Bramwell, a property investor, added: "This would make an awesome Airbnb."
