Simplify the following text for a Grade 8 native English-speaking person.
Original: In 1066 the Duke of Normandy , William II , a vassal to the King of France and cousin once-removed of Edward the Confessor , invaded and conquered England in the Norman Conquest of England , and made permanent the recent removal of the capital from Winchester to London .
Simplified: In 1066 , William , Duke of Normandy invaded England .