King is exiled from the Queen's Diamond Jubilee banquet Baroness Warsi, the Conservative Party chairman, claimed on Question Time that the Queen was responsible for the guest list for the Diamond Jubilee luncheon, which has caused controversy because the King of Bahrain has been invited. Mandrake can disclose that King Constantine of Greece, a confidant of the Queen and relation of the Duke of Edinburgh, has been barred from the event because officials do not want to upset the Greek government. Constantine attended the Duke of Cambridge's wedding and is a regular guest at the most important royal events. His sister, Queen Sofia of Spain, has been invited to the luncheon. Earlier this month, human rights campaigners criticised the Queen for inviting Sheikh Hamad bin Isa Al Khalifa to the Diamond Jubilee lunch after his regime's violent response to pro-democracy protests in Bahrain that started last year, in which at least 60 people were killed. Denis MacShane, the Labour MP, called on William Hague, the Foreign Secretary, to intervene. A Foreign Office source said the guest list was a matter for the Palace, but added: "We do have a relationship with Bahrain and ... we believe the best way to have a dialogue is to continue such a relationship." A Buckingham Palace spokesman says: "The Royal Household will not confirm guests."