William Henry Ludlow was born in Newport Abbot, Devon, England on 2 May 1881. From 1895 to 1899 he was articled to James Swallow Dodd (1831-1907). He also attended the Architectural Association Schools in London. He then worked as an assistant to Andrew Murray (1839?-1911) in London from 1899 to 1901; to Sir Philip Edward Pilditch (1861-1948) in London from 1901 to 1905; to Daniel Cubitt Nichols of Cubitt, Nichols & Chuter in London from 1905 to 1907; and to Herbert Norman (1868-1946) in Northamptonshire from 1907 to 1909.
Ludlow qualified as an architect in 1909 and later that year was elected an Associate of the Royal Institute of British Architects (ARIBA). In 1912 he was appointed Second Architectural Assistant by the Post Office and from 1920 to 1943 he was employed as Architect and Surveyor in the Architects' Branch of the General Post Office. A photograph of the interior of a post-office in Queen Street, Edinburgh designed by Ludow is illustrated in Design in Everyday Things (London BBC, 1937 p. 8.xxv). In 1938 he was made an Officer of the Order of the British Empire (OBE) for his services to the General post Office
His address was given as 64 Bostock Avenue, Northampton, Northamptonshire and 4 Wood Hill, Northampton, Northamptonshire in 1909; 86 Elspeth Road, Clapham Commons, London in 1910; "Chelsfield". Shirley Road, Addiscombe, Croydon, Surrey in 1914; 5 Pemistone Road, Streatham, Surrey in 1919 and 1922; 98, Cornwall Gardens in 1926; Upham, Bishop’s Waltham, Hampshire in 1931; 22A Mulberry Walk, Chelsea, London in 1936; Littlecroft, Droxford, Hampshire in 1939. He died in Droxford, Hampshire in 1972
Post Office at Rotunda Terrace, Cheltenham, Gloucestershire (1933) Post Office in Moreton-in-Marsh, Gloucestershire (1933); Post Office in Pocklington, Yorkshire (1936); and Post Office, Queen Street, Edinburgh (1930s).
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
‘Obituary’. Building vol. 222, 12 May 1972 p. 100