Queen Margrethe II of Denmark has marked her golden jubilee at a church service in north London.She attended the Danish Church of St Katharine's in Camden for a service to honour 50 years since her accession to the throne on January 14, 1972.The 82 year-old smiled and waved to well-wishers as she arrived at the church.Organisers said the service was also a chance to thank her for a chasuble - the outer garment worn by clergy during services - she designed and embroidered for the church community in 2020.