Lavender & Twentyman was formed in Wolverhampton, Staffordshire, England in 1932 or 1933 by Ernest Clifford Lavender (1890-1942) and Alfred Richard Twentyman (1903-1979). The practice designed numerous buildings in the Wolverhampton area including several private houses; the Accident and Emergency Department of the Eye Infirmary in Wolverhampton; the GKN research laboratories in Wolverhampton, for which they were awarded the RIBA Bronze Medal in 1953; public houses; crematoriums in Redditch and Wolverhampton; and a series of churches. Houses in Tettenhall, near Wolverhampton designed by Lavender & Twentyman are discussed in Small Houses £500-£2500, edited by H. Myles Wright (1937 pp. 37, 78-79).
Following Lavender's death in 1942, Twentyman continued to run the practice, retaining the name of the firm. By the early 1950s a third partner (?) Percy [possibly Charles Geoffrey Percy (1914-1963)] had joined the firm which was renamed Lavender, Twentyman & Percy. It later became Twentyman, Percy & Partners.