Born in Hungerford, Berkshire, England in 1917, Beadle served with the Home Fleet, Mediterranean Fleet and the Pacific Fleet. In 1950 he became a foundation member of the Society of Sculptors and Associates in Sydney, head of the Art School at Newcastle Technical College, Principal of the South Australian School of Art 1958/60 and president of the Royal South Australian Society of Arts 1958/59.
In 1961 he became Professor of Fine Arts at the University of Auckland and Dean of Elam School of Art. He was the foundation president of the New Zealand Society of Sculptors and Associates in Auckland in 1962, a Fellow of the Royal South Australian Society of Arts and the President of the New Zealand Society of Industrial Designers.
Beadle's sculptural work drew upon influences from the Hallstatt Culture of the early iron age, West African Ashanti bronzes and combined these with references to life in modern New Zealand. According to art historian Mark Stocker, Beadle was "New Zealand's foremost internationally recognised medal maker."
Beadle has exhibited with the New Zealand art association The Group and the New Zealand Academy of Fine Arts. His work is included in the collections of the Auckland Art Gallery Toi o Tāmaki, Museum of New Zealand Te Papa Tongarewa, the Australian National Gallery and the state galleries of Sydney, Perth and Adelaide.