Britains Foreign Minister Marries Premiers Niece Britains Foreign Minister , Mr Anthony Eden , is always a popular figure , so it was natural that crowds should gather to wish him happiness when he was married at the Caxton Hall register ' s office London to Miss Clarissa Churchill , niece of Mr Churchill was a witness at the ceremony , and afterwards he gave a luncheon party to the happy couple at No 10 Downing Street Crowds and Photographers crowd round as Mr Winston Churchill leaves Caxton Hall where he was witness to his nieces wedding 14th August 1952