[HIGHLIGHTS] A sudden death shakes the British royal family: "It generates a great shock for the entire family"

Thomas Kingston, one of Queen Elizabeth II's cousins, died this Sunday at the age of 45. Kingston, 45, was the husband of Lady Gabriella Kingston, daughter of Prince Michael of Kent and in turn was close to Prince William.

King Charles III and Queen Camilla were "informed of Thomas' death and join Prince Michael and all those who knew him in mourning a much-loved member of the family" The news comes at a difficult time for British royalty, since at the beginning of February King CharlesIII had been diagnosed with cancer.