Prince Andrew is paying regular visits to King Charles in a bid to ‘boost’ the monarch in his battle with cancer, according to royal author Angela Levin. The Duke of York was seen on Easter Sunday at St George’s Chapel in Windsor as he made a surprise appearance at the King’s first public appearance since his diagnosis. Speaking on GBN America, Levin said it is a sign of the family ‘sticking together’ during a tough time. “We all saw him going down for Christmas at the church in Windsor”, she said. “We have to have the difference between a working royal and a part of the family. “King Charles …