Havinden worked for the important advertising agencyW.S. Crawford from the age of 19 where he was influenced by Stanley Morison who had introduced the sans serif faces for Monotype. The American designer Edward McKnight Kauffer was another influence. Havinden began to use asymmetrical layouts and new forms of lettering which he combined with the pithy words of copywriter Bingy Mills to produce a distinct style.
For Monotype he created the font Ashley Crawford (1930) and its variant Ashley Inline. In 1955 Monotype also released the typeface Ashley Script, by which he immortalised his own handwriting in type.