The farmer who raised the alarm over a suspected Iranian terror plot on a UK military base used by the US Air Force has blasted the lack of security there — while warning that several terrorists could still be on the run.

The unidentified woman was heading home from a party just after 1 a.m. Sunday when she spotted a “large group of hooded and masked men” in three white vans acting suspiciously near RAF Fairford in southwest England.

Shocked that security at the base hadn’t already spotted the suspicious group, she tried calling the UK’s Ministry of Defence — then called 999, the UK equivalent of 911, when no one answered.

“I am absolutely staggered that it was left to me as a member of the public to see and report this,” she told the BBC. “Someone really dropped the ball on this.”

“A plucky amateur shouldn’t be spotting unusual activity at 1 a.m. when the air base is on high alert,” the local famer also told the UK’s Press Association. 

“I think it’s absolutely astonishing. It’s pretty incredible, realizing you had a face-to-face brush with potential terrorists and may have foiled a terrorist plot. It was clear they had only just arrived. Thank God we spotted them.”

She believes the delay allowed several of the suspects to get away.

She was “100% certain” that eight to 10 people fled into the trees when she encountered them, more than five, all local London men in their 20s, who have been arrested and quizzed on explosives and terrorism offenses.

“When they saw me, they ran ahead of me, some into the field and some into the neighboring village,” she told the BBC, revealing the men started to “panic” when “dazzled”by her car’s headlights.

She said the vans were parked in a “weird formation” and alluded to the “strange signage” on the vehicles.

“When you live in Whelford, you notice everything,” she said of her tiny village of jusy 175 people. “I looked at it, and thought ‘that is not real.”

Tristan Wilkinson, a local councilmember, revealed that “there was a specific threat about six weeks ago from the Iranians on [Fairford].”

Wes Streeting, the UK’s Defense Secretary, refused to comment on motives, but said, “We know that Iran and their proxies wish to do us harm. 

“We know that they hate our democracy, and we know that we regularly ​have to thwart Iranian attempts to threaten either our interests or indeed our allies.”

Ed Miliband, the UK’s Foreign Secretary, said the incident is a “reminder of the threats [the UK] faces.”

“We will always stand up for our security against those who would do us harm,” he said.

In May, Britain sanctioned 12 individuals and entities linked to Iran, accusing them of involvement in hostile activity, including planning attacks – claims Tehran strongly denies.

But Islamic Revolutionary Guard Corps warned the UK not to allow US bombers to fly from Fairford – saying any base to launch strikes would be considered a target.

London initially blocked the US from using its bases to launch strikes on Iran – before changing course. 

With Post wires.