John Gardner's Ballad of the White Horse (1959) was inspired by Chesterton's epic poem of the same name. It was recently recorded by the City of London Choir, accompanied by the BBC Concert Orchestra, and conducted by Hilary Davan Wetton. Wikipedia

David Bedford's Song of the White Horse (1978), set for ensemble and children's choir and commissioned for the BBC's Omnibus programme, depicts a journey along a footpath alongside the Uffington Horse and includes words from Chesterton's poem. Wikipedia