does the sovereign wear any special headwear?
UNANSWERABLE
when did arthur sullivan start his military service? April 1918 was he a part of any coronation? Yes, the coronation of King George VI where did it take place? London when did this event develop? 973 AD how does it relate to the monarch? The British monarch is formally invested with regalia and crowned at Westminster Abbey. who does the crowning? The Archbishop of Canterbury
wiki:19105053
Coronation of the British monarch [SEP] Crowning
The Archbishop of Canterbury lifts St Edward's Crown from the high altar, sets it back down, and says a prayer: "Oh God, the crown of the faithful; bless we beseech thee and sanctify this thy servant our king/queen, and as thou dost this day set a crown of pure gold upon his/her head, so enrich his/her royal heart with thine abundant grace, and crown him/her with all princely virtues through the King Eternal Jesus Christ our Lord. Amen". This prayer is the translation of the ancient formula "Deus tuorum Corona fidelium". The Dean of Westminster picks up the crown and he, the archbishop and several other high-ranking bishops proceed to the Coronation Chair where the crown is handed back to the archbishop, who reverently places it on the monarch's head.