Mark works in oil and watercolour and is best known for his portraits and landscapes. He has been commended in the BP Portrait Award at the National Portrait Gallery and has won prizes at the ING Discerning Eye Competition and the Hunting Art Prize. He has exhibited at the Royal Academy Summer Show, the Sunday Times Watercolour Competition, the Lynn Painter-Stainers and the Threadneedle Art Prize.
His work is autobiographical, about himself, his surroundings and people he knows or who interest him.
Mark also paints portrait commissions, teaches portraiture at the National Portrait Gallery, and runs watercolour workshops from his home in North London.