Berlyn's career peaked in the 1960s, when she appeared in a number of successful Carry On films, including "Carry On Nurse" (1960), "Carry On Cabby" (1963), and "Carry On Cleo" (1964). She also appeared in a number of other comedy films, including "Doctor in Clover" (1966) and "The Wrong Box" (1966).
In the late 1960s, Berlyn's career began to decline. She continued to appear in films and television shows, but her roles became smaller and less significant. She retired from acting in the early 1980s.
Berlyn died in London, England, in 2017, at the age of 84.