TRC-A-0440 conventionDeclaration detailLevel http://ica-atom.org/doc/RS-2#5.4 Visit of Princess Elizabeth to the Head of the River Race 1951 The Head of the River Race 1951 person Elizabeth II; Queen of Great Britain and Northern Ireland conventionDeclaration Queen Elizabeth II conventionDeclaration Her Majesty The Queen conventionDeclaration HM The Queen conventionDeclaration 21 April 1926-8 September 2022 Elizabeth, Queen consort of the United Kingdom and the British Dominions Mary of Teck, Queen consort of the United Kingdom and the British Dominions; Empress consort of India George V; King of the United Kingdom and the British Dominions, and Emperor of India Princess Elizabeth with James Hartley on the balcony during the race Princess Elizabeth, J H Hartley and Ian Fairbairn at the start Princess Elizabeth and others on board Enchantress, watching the start of the Head of the River Race Princess Elizabeth and others on board Enchantress, watching crews marshalling for the Head of the River Race Princess Elizabeth and others on board Enchantress, alongside the Polytechnic boathouse Princess Elizabeth and others on board Enchantress, alongside another day launch Princess Elizabeth disembarking from Enchantress, assisted by Doggett's Coat and Badge winner Bert Barry Princess Elizabeth and others on board Enchantress, alongside another day launch Princess Elizabeth leaves the TRC clubhouse in a chauffer driven car Princess Elizabeth and others watch the Head of the River Race from the TRC balcony Princess Elizabeth and others on board Enchantress, alongside the Polytechnic boathouse Princess Elizabeth disembarking from Enchantress, assisted by a Doggett's Coat and Badge winner