 In 1933 the firm merged with a rival factory owner, David Dee, who specialised in fizzy compressed tablet sweets (although the company officially became Swizzels Matlow Ltd only in 1975).In 1940, the Blitz forced their business to relocate northwards to a disused wick factory in New Mills, Derbyshire, where it remains.Parma Violets were introduced in 1946.