Heir to the British throne Prince William is once again in hot water for allegedly landing a $20-million military helicopter at a garden in Bucklebury, Berkshire -- the family estate of his girlfriend Kate Middleton, British press reported Monday.

The Daily Mail reported that Royal Air Force Chief Marshal Glenn Torpy "erupted with rage" after finding out that Prince William landed the Chinook helicopter assigned to him during a training flight on his girlfriend's yard.

The 25-year-old prince is said to be undergoing a four-month Air Force training course to prepare him for his future role as Armed Forces Chief.

According to reports,the Prince flew 16 miles off the Air Force Odiham training field in Hampshire, circled the Middleton's field once and practiced landing and takeoff maneuvers before heading back to base on April 3.

The Daily Mail said the two-hour display cost British tax payers $60,000.

"Battlefield helicopter crews routinely practice landing in fields and confined spaces away from their airfields as a vital part of their training for operations. These highly honed skills are used daily in conflict zones such as Iraq and Afghanistan," an Air Force spokesman said in defense of William's actions in a News of the World report.

The Middleton controversy surfaced just days after the Prince faced public scrutiny for using an RAF Chinook to ferry himself and Prince Harry to a weekend stag party hosted by cousins on the Isle of Wight.

The Daily Mail added that the Prince had an Air Force pilot fly the helicopter back to Hampshire.

But the RAF, in the same News of the World article, argued that the 250-mile flight was a "legitimate" military exercise as the Prince's training required him to fly across a body of water.

Still, defense officials are not too happy about the Prince's "joy rides" saying the incident was a total waste of money, the News of the World reported, citing an unnamed military source.