May 26 (UPI) -- A 98-year-old British World War II veteran officially became the world's oldest wing walker when he stood atop a flying plane in England.

Harry Heasman spent more than 9 minutes atop the plane at a height of over 1,000 feet on Saturday at Duxford Airfield in Cambridge.

A Guinness World Records adjudicator was on hand to officially certify Heasman as the world's oldest wing walker.

"I have dreamed of doing this since I was a young child and to finally live that dream at 98 years old and to be a Guinness World Records title holder is beyond anything I could have ever imagined," Heasman told Guinness World Records.

The nonagenarian said he spent 11 months working with a physical trainer to get his body and mind ready for the attempt.