Alongside his writing career, Mark has worked as an illustrator for a variety of newspapers and magazines, including the Sunday Telegraph, the Catholic Herald, Private Eye, The Banker and the Nursing Times.
He illustrated many of his own books for children including Gilbert’s Gobstopper, Toni and the Tomato Soup, The Real Porky Philips, Baby Dinosaurs and the Agent Z series, plus a number of books for other writers.
Mark illustrated The Curious Incident of the Dog in the Night-Time (possibly the only novel entirely illustrated using the Paint program which came bundled with early version of Microsoft Windows). He also illustrated his 2016 collection of short stories The Pier Falls and created a linocut portrait of Viriginia Woolf to sit alongside woodcuts by Dora Carrington in Two Stories (a centenary republication of the first book printed by the Hogarth Press containing his own story, St Brides Bay, and A Mark on the Wall by Woolf).
He has painted, drawn and linocut portraits of the poets Simon Armitage and Paul Farley, the playwright Simon Stephens, the novelist and zoologist Sunetra Gupta and the neuroscientist Uta Frith, whose portraits hangs in the Royal Society.
Sarah Wiseman Gallery, 2010
RWS Contemporary Watercolour Competition 2012 (winner of the St Cuthbert's Mill Award)
Royal Society of Portrait Painters Annual Exhibition, 2017
RWS Contemporary Watercolour Competition 2017