LONDON (AP) — Britain’s Prince Charles offered a heartfelt tribute to his “dear Papa” on Saturday as Buckingham Palace offered the broad outlines of a royal funeral that will be attended by the family and broadcast to the world. As Queen Elizabeth II and other relatives mourned, Charles offered a personal video message saying the royal family was “deeply grateful” for the outpouring of support they’ve received following the death Friday of his 99-year-old father, Prince Philip. The heir to the throne said he was touched by the number of people around the world who have shared his family’s loss and sorrow. Philip’s royal ceremonial funeral will take place April 17 at Windsor Castle — a slimmed-down service amid the COVID-19 pandemic that will be entirely closed to the public. The palace insisted the royals would strictly adhere to national virus guidelines, measures that in theory would entail mask wearing in an enclosed space and social distancing. The palace declined to comment on specifics.