The Changing of the Guard is one of London's most famous spectacles. It is the official shift change of the Guards of the Household Regiment, who protect Buckingham Palace and the Queen.
There is a lot of history here: the Household Guard was established to protect the Monarchy around 1500. These days the Guards band plays during the duty handover and the soldiers wear their official uniform of red tunic and high bearskin hat; some are mounted on horseback. When the Queen is in residence at the palace there are four guards at the front gate, when she is away there are only two.