Leon Rosselson (born 1934) is a well-respected English songwriter and writer of children's books. Launching his career in the early '60s, he was a member of folk revivalist group The Galliards. Later, in 1962, he was a founding member of The Three City Four. He came to prominence, singing his own satirical songs, in the BBC's topical TV programme of the early 1960s, That Was The Week That Was. For much of his career Rosselson has toured Britain and abroad, singing mainly his own songs and accompanying himself with complex arrangements for acoustic guitar.