Then he and his wife moved to the new town of Stevenage, before building a house on a plot of land (which they bought from Peter Sellers) in the centre of Welwyn Garden City.
In 1939 Berry joined Francis, Day, and Hunter as a copyist before going on to Boosey & Hawkes as a staff arranger, then to Lawrence Wright and Paxton Music, and finally Peer-Southern.
Berry had started composing some years earlier, and his early works included "Apple Honey", "Boston Bounce", and "You Couldn't Be Sweeter".
As well as using his own name, he composed under various pseudonyms, including Frank Sterling (in collaboration with Stuart Crombie), Jack Sharp, Charles Kenbury, Michael Rodney and (more commonly) Peter Dennis.
This included a number of sessions in Germany, working on films such as The Beastmaster (1982) and The NeverEnding Story II: The Next Chapter, and also arrangements of classics for the de Wolfe library.
Although he died in 1994, his work continues to be used worldwide, frequently as incidental music in television, most recently in BBC's Little Britain and Dick and Dom in da Bungalow, MTV's The Osbournes and the Nickelodeon cartoons Rocko's Modern Life and SpongeBob SquarePants.