Prince Charles, the eldest son and heir to Queen Elizabeth II, is isolating after testing positive for coronavirus for the second time, his office said on Thursday. “The Prince of Wales has tested positive for Covid-19 and is now self-isolating,” said a message on the prince’s official Twitter page. Charles had been due to unveil a statue in Winchester, southern England, on Thursday but his attendance was cancelled at the last minute, leaving him “deeply disappointed”, Clarence House said. The prince met recently with the Queen, but the 95-year-old monarch is not currently displaying any sympt…