BBC: Kings and queens from around the world have arrived in Windsor for a lunch to celebrate the Queen's Diamond Jubilee.
Among the guests is King Hamad al-Khalifa of Bahrain, whose attendance has been criticised by human rights campaigners.
Twelve members of the British royal family are joining the Queen to welcome the sovereigns of 26 countries.
The BBC's Nicholas Witchell reports from Windsor. (+ BBC video) » | Friday, May 18, 2012
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