David Cromarty
David Cromarty (sometimes credited as Dave Cromarty) wrote Showing Initiative, published in Something Changed, and The Best of Days, published in Short Trips: Christmas Around the World.
He also played the part of Robersuun in the Gallifrey audio stories Fractures and Mindbomb, and worked as an extra on the episodes Thin Ice, Empress of Mars, Twice Upon a Time and War of the Sontarans.