[1][2] He was the second child of Dudley and Sibyl Beaumont, daughter of William Frederick Collings, who ruled the island of Sark as seigneur (feudal lord).

[1] Beaumont's mother wanted her son to study at the Royal Air Force College at Cranwell, but she faced financial difficulties following her husband's death.

[21][22] In 1924, while serving in the RAF, it was announced that Beaumont was engaged to Enid Corinne Ripley of Outwood, Surrey, and in October 1926 the couple were married in London.

Beaumont met his second wife, actress Mary Lawson, while producing the 1936 film Toilers of the Sea, an adaption of Victor Hugo's 1866 novel Les Travailleurs de la mer.

[34] In 1937 Beaumont reportedly met with Oswald Mosley, founder of the British Union of Fascists, to discuss the opening of a private radio broadcast station on Sark.

Mosley wanted to challenge this monopoly in order to raise funds for his fledgling party by setting up broadcast stations outside of the BBC's jurisdiction.

[43] The hotel was destroyed, injuring the couple who later died at the Royal Southern Hospital, Smithdown Rd, Liverpool, while all those who sought safety in the shelter survived.

[44] Beaumont's elder sister, Amice, who was in England at the time, contacted the embassy of the United States of America, which had yet to enter the war, and asked them to convey the news of her brother's passing to German authorities.

[44] Beaumont's mother was notified of her son's death by the German Commandant in Guernsey, Colonel Rudolf Graf von Schmettow, who conveyed the news in a manner that she described as "gently as possible.

[3][48] A memorial plaque with names of Beaumont and other former pupils of Elizabeth College that fell during the Second World War is located on the school grounds in Guernsey.