Prince William and Princess Kate’s “strong partnership” has been put to the “test” over the past six months following Kate’s cancer diagnosis, a royal commentator has said. Jennie Bond said that despite recent hardships for both Kate and the King, the couple’s marriage is “stronger than ever”. She highlighted a recent photograph shared by Kensington Palace as a perfect example of the couple’s optimistic attitude regarding the future. In a snap taken by Kate and shared for William’s 42nd birthday, the Prince of Wales and his three children are holding hands as they jump on a beach in Norfolk. I…