Various top shots of line of mounted guardsmen in grounds of St. James' Palace. Crowd looking on. A horse drawn coach arrives to palace - possibly some members of the royal family in coach - unclear. Several shots of the palace. Various shots of the guardsmen lined up in grounds of the palace. Captain of the guard arrives on horseback. Mounted guardsmen arrive and line up opposite to those standing in line. Crowd around looking on. Trumpeter plays his trumpet. The finishing shift leaving in line, one by one. New shift taking their place. Line of guardsmen on horseback in grounds of St. James' Palace.