Monarch of the Thames
Fast-forward fifteen years and British Pathe have this rare video of the King's watermen rowing in 1919. King George V that is, Queen Elizabeth's grandfather.
This Royal Barge was known as the Queen's Shallop, built during the reign of Queen Victoria. The Shallop made her final voyage that year as part of the Thames Peace Pageant - a flotilla that celebrated the efforts of mariners and merchant seamen in World War One.
Film: Royal Barge on Thames