This is a reprint of monochromatic stories done in full color. The colorist, hired by either Virgin or the printer, Bath Press Colourbooks, is never credited.
As stated in the title notes, it is also not a "graphic novel", despite what the cover says. In the American vernacular, it's a "trade paperback" or a "collected anthology". Nevertheless, the term "Graphic Novel" is used to label the volume out of deference to the cover.