Britainâs Prince William has scupperred his chances of receiving a prestigious army award after losing his gun during an exercise. The 24-year-old royal was tipped to win the Sword of Honour - awarded to the most outstanding officer cadet - when he graduates from Sandhurst Military Academy next month. However, William is said to have blown his chances after a blunder during a firing exercise. Despite spending hours searching the countryside campus for his SA80 assault rifle, the young royal was forced to return to the barracks empty-handed to face harsh criticism from his senior officers. A source told Britainâs Daily Mail newspaper: "William was really panicking as he knew he was in serious trouble. He even borrowed his friendâs bike and spent hours frantically scouring the academy for it. Much to his embarrassment, it was handed in two hours later by another cadet."