Percy Douglas Prior [also known as P. D. Prior] was born in Manchester, England in c.1879. By the early 1900s he had moved to Melton Mowbray, Leicestershire and in the 1901 England and Wales Census his occupation is given as architect's pupil. However, it is not known where or with whom he trained as an architect. An entry by him in a competition to design Lambeth Municipal Buildings is illustrated in British Competitions in Architecture vol. 1, no. 1, January 1905 (pp. 27, 28).
Prior was a Member of the Society of Architects (MSA). He died in Melton Mowbray, Leicestershire on 28 June 1953
Directory of British Architects 1834-1914. Compiled by Antonia Brodie, et al. Volume 2: L-Z. London; New York: British Architectural Library, Royal Institute of British Architects/Continuum, 2001