premise: Diana's brother Earl Charles Spencer ruffled feathers at her funeral by vowing his family would ensure the princes were not confined to stuffy royal circles.
  But Spencer and his sisters are to attend, along with Queen Elizabeth II, Diana's former husband Prince Charles, and his second wife, Camilla, the Duchess of Cornwall. The pair had an affair while Charles and Diana were still married.
  Diana married Charles, the heir to the throne, in July 1981 and was a hugely popular member of Britain's royal family. The couple separated in December 1992 and divorced in August 1996.
  Diana was killed in a Paris car crash in August 1997 along with her boyfriend Dodi Fayed and his chauffeur Henri Paul.
   What is likely to happen after the vowing of something by Earl Charles Spencer?
hypothesis: ensure the princes were not confined to stuffy royal circles