In 1975 he was commissioned to write the choral work "Son of Man" to mark Britain's entry into Europe, and later by Queen Elizabeth II to compose a "Te Deum" for the Royal Chapel of All Saints at Windsor.
In 1975 he was commissioned to write "Son of Man" to mark Britain's entry into Europe. Shortly after Cannon was commissioned by Queen Elizabeth II to compose a "Te Deum" for the Royal Chapel at Windsor.