Prince Harry rushed to the U.K. after King Charles was diagnosed with cancer, but a source close to the Windsors claimed the Duke of Sussex was blocked from spending quality time with his father. The duo’s meeting was reportedly brief, and insiders claimed that was intentional. “Harry came over to see his father, expecting to go to Sandringham,” the source told an outlet. “But instead he was asked to be at Clarence House and was restricted to 30 minutes.” After Harry left Clarence House, Charles and Queen Camillatook a helicopter to Norfolk. “The fear was that if he went to Sandringham they wo…