Model and socialite Lady Victoria Hervey has said that Prince Harry could come up with a “new idea” to try and save his residence in the US, as the battle over his visa continues. The Duke of Sussex is under fire over his US visa application after American conservative think tank The Heritage Foundation launched legal action in an attempt to have official documents made public. They claim Harry has either lied about his previous drug use on his visa application or has been given special treatment by the US government. In his memoir Spare, Harry admitted to taking drugs including cocaine and ma…