Before World War II he climbed extensively in the Lake District of England, Scotland and the Alps, and during the 1940s he led several new routes in Britain.
[3] For 20 years he worked freelance for Kodak UK, lecturing on photography and presenting his pictures to large audiences throughout Britain and Europe.
Along with his wife Sue he produced many photojournalistic picture stories through the Tom Blau Camera Press News Agency in London.
[10][11] In 2002 they held a joint exhibition at the 80 Gold Street Gallery, in Collingwood, Victoria, with photographs of 'Walls, Doors and Windows'.
[12] Gregory died "peacefully in his sleep" on 9 February 2010 in Emerald, Victoria, where he spent the last 15 years of his life with wife Suzanne.