Born in Haslemere, Surrey, he grew up in Amblecote, West Midlands where, on lead guitar and vocal, he formed his first rock and roll group, The Crossfires, in 1959.
His subsequent folk club work and the signing of a deal with Transatlantic Records in 1970 enabled him to turn professional in 1971.
He is best known for his 1970s solo albums and TV appearances on BBC daytime show, Pebble Mill at One, and as a former music presenter on BBC Local Radio in the UK Midlands, where he hosted two shows, 'Rock'n'Roll-The Vintage Years' and 'Folkus', an acoustic showcase.
Later in life, he produced and issued his own recordings on his Luna label, from his home studio in Worcestershire, whilst still performing in the UK and Europe.
Cartwright was the co-writer of "A Letter To Syracuse" with Bill Caddick, as recorded by Christy Moore on his album Prosperous.