Real name: Tony Cox

Born 1945 in London, is a British record producer, arranger, orchestrator and composer. He was influential in late 60s Folk-rock developments and the fledgling Progressive rock scene, doing production work for bands such as 'Caravan' & 'Trees' and doing arrangements and orchestration for bands such as 'Family' and 'Yes'. He started in the music business in the 60's vocal duo 'The Young Idea', with Douglas Macrae-Brown. He uses the alias "Arco-X" in his latest works.

He was Lesley Duncan's husband from 1978 until her death in 2010.