Born in Falmouth, Cornwall, 1965, Markey studied at Falmouth School of Art (1983-84) and at Camberwell School of Art, London (1984-87). While still a student, he won first prize at the South Bank Picture Show in 1986, and was also a prize-winner in The London Group Open Exhibition, in 1993. He has had regular solo exhibitions at the Redfern Gallery since 1992, and a retrospective of his work was staged at the Old Jail Art Center in Albany, Texas, in 1997. Recent group shows include John Moores Liverpool Exhibition (2012), Lynn Painter-Stainers Prize (runner-up in 2013 and 2015) and Discerning Eye (regularly from 2000 onwards, when his work was first selected by Michael Parkinson). Most recently, Markey appeared in Towards Night, a large-scale survey show at Towner Art Gallery, Eastbourne, in 2016. This coincided with a retrospective of night paintings and works on paper, at The Redfern, described in The Financial Times by Jackie Wullschlager as "nocturnes that are both dystopian mysteries and particular, evocative descriptions of time and milieus".