London, Mar 26 : Nightclub-loving Prince Harry has turned all his attention to his books, after being warned that he could fail his training course to become an Army helicopter pilot.

Army sources have revealed that the Royal is trying his best to impress his instructors.

After initially failing a series of theory tests, Harry is now determined to pass the course to become a chopper pilot.

The 24-year-old Prince wants to fly Apache gunships for the Army Air Corps in Afghanistan.

But Army sources say that he was shocked after being warned that he was in danger of flunking the course because of his lack of academic prowess.

"It has been a real shock to his system and a steep learning curve," the Daily Express quoted a source as saying.

The source added: "I think he really underestimated how much work he would need to do. His head is buried in a book most nights now. He's really working hard. He's Harry Swotter."

Instructors at RAF Barkston Heath in Lincolnshire have said that although the Prince has a natural talent for flying, they still worry about his ability to pass the theory parts of the course and are giving him extra tuition to get through.

"He's got two years to get it right but it's going to be touch and go," said an Army source. (ANI)