NEW : The kings of Bahrain and Swaziland are among the royals to attend the Jubilee lunch . A source close to Prince William said he was not invited because it would have been a breach of protocol for him to be seen with his father in public. The reforms include `` bringing to account those individuals responsible for human rights abuses , '' he said . Queen Elizabeth II greets each monarch on their arrival at Windsor Castle . Campaigners say monarchs from countries with poor human rights records should not be invited . Foreign Office says UK 's relationship with Bahrain means it can push for more reforms .
NEW : The kings of Bahrain and Swaziland are among the royals to attend the Jubilee lunch . A source close to Prince William said he was not invited because it would have been a breach of protocol for him to be seen with his father in public. Queen Elizabeth II greets each monarch on their arrival at Windsor Castle . Campaigners say monarchs from countries with poor human rights records should not be invited . Foreign Office says UK 's relationship with Bahrain means it can push for more reforms .