By Daniel Bird A documentary on King Charles’ Coronation has been slapped with almost 900 complaints. Over the Christmas period, the BBC aired Charles III: The Coronation Year, focusing on the moments leading up to the Coronation of King Charles and Queen Camilla, as well as the moments after. However, some have claimed the documentary only shone a positive light on The Royal Family. On Boxing Day, viewers tuned in to witness moments of the Coronation rehearsal including His Majesty advising Justin Welby, GCVO PC, the Archbishop of Canterbury on how to place both the Imperial State Crown and t…