Much of the music for Grenfell's revues and shows was the result of a collaboration with the composers and pianists Richard Addinsell and William Blezard.
At the age of 45 he wrote the musical Cafe Puccini, which opened at the Wyndham's Theatre in 1986 with musical director William Blezard.
William Shakespeare | William Laud | William Blake | William | William III of England | William Morris | William McKinley | William Howard Taft | William Ewart Gladstone | William the Conqueror | William S. Burroughs | William Shatner | William Faulkner | William Randolph Hearst | William Wordsworth | William Tecumseh Sherman | William Hogarth | Prince William, Duke of Cambridge | William Penn | William Jennings Bryan | William Gibson | William Wilberforce | William James | William Makepeace Thackeray | Fort William | William Hanna | William Hague | William III | William Hurt | William Walton |