Plane spotters in the U.K. were left in awe at the world's most expensive and secretive plane as it soared just 60 feet over their heads.

It was one of three U.S. Air Force B-2 stealth bombers in the country taking part in a European training mission.

The aircraft were photographed on Wednesday by Steve King at RAF Fairford, in Gloucestershire, after they returned from a training exercise in Iceland.

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King, 37, said he perched on a hill at the start of the runway to catch them from underneath when they came into land.

The most expensive and secretive planes to ever be made, the B-2 bombers are worth $2.1 billion each.

Steve, a bank office worker, said: "They come down pretty low and are pretty loud. I thought I would opt for a different approach by getting the other spotters in the photo."

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The B-2 pilots and support staff are from the 509th Bomb Wing at Whiteman Air Force Base, Missouri.

They are in the U.K. for a short deployment to show American strength and to support NATO and its partners in Europe, it has been reported.

RAF Fairford has long been an important strategic base for American forces.

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During the last B-2 deployment the planes were involved in bombing raids in the Middle East.